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Home Country's Bank Cards and Debit Cards and Verification

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Hello everyone,

I'm an American preparing for possible retirement in Thailand, and I’ve got a couple of questions for those of you who’ve already made the move.

1. How do you handle your home country’s banks when it comes to new debit or credit cards?
For example, if your U.S. bank issues a replacement card and needs to verify your identity, how do you deal with that when you’re overseas?

2. What do you do about security texts and verification calls, especially if you're no longer using your home country’s phone number?
I’m concerned that if I switch to a Thai SIM card, my U.S. bank might not recognize the new number and could end up locking my card or account.

Are there any good solutions out there—like apps or services—that help manage this? Do eSIMs work better in this situation? I’d really appreciate any tips or setups that have worked for you.

Thanks in advance! 🙏

many US banks will not accept a Thai phone number

 

email authentication is a someplaces available option

  • Popular Post

Get a US number like from Lycamobile. Activate the sim in the US. In Thailand you will be able to receive calls, text, and bank codes from the US. Most banks require a residency address, possibly a relative's address, and a mailing address. A service like this one https://travelingmailbox.com/services

will work. They will scan your mail, and if you need something forwarded, they will do that also.

  • Popular Post

Keep your US mobile phone active - I've been here since around 2006 on and off for the fist few years then full time since about 2009

I kept my UK cellphone active with a low level monthly subscription for one reason only - banking. Receiving SMS costs nothing - at least from the UK - not sure about the US.

It pays to think ahead - just keep paying it and keep an address in the US for both the account and the Phone.

Also don't forget the IRS - you still need to make filings - I know US citizens who don't file anything - they just leave and forget about it - and they know they're in for a world of pain one day when it catches up with them - and it will catch up eventually!

 

Something else to consider is whether you have financials (CDs etc.) that require in-person changes. See if you can automate.

I keep a US address (on my drivers license and otherwise) with relatives and a legit cell phone number, not some mailing service or internet number online spoof thing. 

 

On 9/3/2025 at 7:19 AM, bunnydrops said:

Get a US number like from Lycamobile. Activate the sim in the US. In Thailand you will be able to receive calls, text, and bank codes from the US. Most banks require a residency address, possibly a relative's address, and a mailing address. A service like this one https://travelingmailbox.com/services

will work. They will scan your mail, and if you need something forwarded, they will do that also.

Lycamobile appears to be a competitor to UltraMobile's PayGo sim service.  The sim from UltraMobile is ~$15 but the monthly is ~$3.12 compared to $7.78/month for Lycamobile but sim is free.

On 9/3/2025 at 6:14 AM, Boulderman said:

Hello everyone,

I'm an American preparing for possible retirement in Thailand, and I’ve got a couple of questions for those of you who’ve already made the move.

1. How do you handle your home country’s banks when it comes to new debit or credit cards?
For example, if your U.S. bank issues a replacement card and needs to verify your identity, how do you deal with that when you’re overseas?

2. What do you do about security texts and verification calls, especially if you're no longer using your home country’s phone number?
I’m concerned that if I switch to a Thai SIM card, my U.S. bank might not recognize the new number and could end up locking my card or account.

Are there any good solutions out there—like apps or services—that help manage this? Do eSIMs work better in this situation? I’d really appreciate any tips or setups that have worked for you.

Thanks in advance! 🙏

Do US banks verify your identity to send a replacement card? I thought banks simply sent the card to the address/postal address registered in your bank account. My EU bank uses TNT to sent my cards to Thailand. I got two replacement cards so far. TNT botched up the address somewhat but there's one good thing about Thai Mail: they put in an effort to find out where the mail should go to,  even if something is missing on the envelope. Unlike Singapore Mail for instance where merely switching the postal code with the house number makes your address invalid.

 

I use an EU SIM but I know my bank also sends SMSs to a Thai phone number. 

 

Now if you need to hide your Thai residency to your bank it's another kettle of fish. You're in for some problems sooner or later.

  • Author
On 9/2/2025 at 5:25 PM, ukrules said:

Keep your US mobile phone active - I've been here since around 2006 on and off for the fist few years then full time since about 2009

I kept my UK cellphone active with a low level monthly subscription for one reason only - banking. Receiving SMS costs nothing - at least from the UK - not sure about the US.

It pays to think ahead - just keep paying it and keep an address in the US for both the account and the Phone.

Also don't forget the IRS - you still need to make filings - I know US citizens who don't file anything - they just leave and forget about it - and they know they're in for a world of pain one day when it catches up with them - and it will catch up eventually!

 

That’s solid advice—and really appreciated. Keeping your original mobile number active for SMS banking is definitely something I’ve been researching, especially with U.S. banks that require 2FA via text. Good to know receiving SMS doesn’t cost anything in your case from the UK; I’ll have to confirm if that’s the same with U.S. carriers like Verizon or T-Mobile when abroad. I’ve heard some travelers use eSIMs for local data and keep their US number via roaming or services like Google Voice, MagicJack, or even NumberBarn—but having that original number live is clearly the most foolproof for security and banking.

Also—totally agree on the IRS filing. Even if you’re abroad long-term, you still have to file annually (with Form 2555 or Foreign Tax Credit, depending on your setup). I’ve heard stories too—some folks just vanish, but as you said, it catches up. With FATCA and global data sharing, it’s not something to mess around with.

Thanks again for the heads-up. Thinking ahead and maintaining both a US address and a US number really seems like the safest long-term play.

  • Popular Post
2 hours ago, Boulderman said:

That’s solid advice—and really appreciated. Keeping your original mobile number active for SMS banking is definitely something I’ve been researching, especially with U.S. banks that require 2FA via text. Good to know receiving SMS doesn’t cost anything in your case from the UK; I’ll have to confirm if that’s the same with U.S. carriers like Verizon or T-Mobile when abroad. I’ve heard some travelers use eSIMs for local data and keep their US number via roaming or services like Google Voice, MagicJack, or even NumberBarn—but having that original number live is clearly the most foolproof for security and banking.

Also—totally agree on the IRS filing. Even if you’re abroad long-term, you still have to file annually (with Form 2555 or Foreign Tax Credit, depending on your setup). I’ve heard stories too—some folks just vanish, but as you said, it catches up. With FATCA and global data sharing, it’s not something to mess around with.

Thanks again for the heads-up. Thinking ahead and maintaining both a US address and a US number really seems like the safest long-term play.

 

Thank you for randomly putting words in bold. It’s not distracting or weird. 

I don't know about the USA, but what I did in Australia before I came to live here is switch my phone plan to prepaid, keeping my number for OTPs and SMSs.  Then just top it up before 6 months (because they discontinue it if it's not topped up after 6 months) I only prepay for 1 week, which is $13 AUD. That gives me another 6 months for OTPs and SMSs.

On 9/3/2025 at 6:14 AM, Boulderman said:

Hello everyone,

I'm an American preparing for possible retirement in Thailand, and I’ve got a couple of questions for those of you who’ve already made the move.

1. How do you handle your home country’s banks when it comes to new debit or credit cards?
For example, if your U.S. bank issues a replacement card and needs to verify your identity, how do you deal with that when you’re overseas?

2. What do you do about security texts and verification calls, especially if you're no longer using your home country’s phone number?
I’m concerned that if I switch to a Thai SIM card, my U.S. bank might not recognize the new number and could end up locking my card or account.

Are there any good solutions out there—like apps or services—that help manage this? Do eSIMs work better in this situation? I’d really appreciate any tips or setups that have worked for you.

Thanks in advance! 🙏

I kept a USA phone # using the magic jack app   it's like  $29 a year  works fantastic !

and my VPN set to  USA

I also have my USA address as my son lives in my house and can recieve any paper mail I may get

On 9/3/2025 at 6:14 AM, Boulderman said:

1. How do you handle your home country’s banks when it comes to new debit or credit cards?
For example, if your U.S. bank issues a replacement card and needs to verify your identity, how do you deal with that when you’re overseas?

2. What do you do about security texts and verification calls, especially if you're no longer using your home country’s phone number?

1. Get a Thai bank account and debit card, then you won't need to use a foreign debit card, and most banks now allow you to create virtual debit cards if you really need to use one.

 

2. Most mobile phones have 2 SIM trays, one for your Thai SIM, one for your home country SIM. No need to change anything with your home country bank.

2 hours ago, marcho said:

I don't know about the USA, but what I did in Australia before I came to live here is switch my phone plan to prepaid, keeping my number for OTPs and SMSs.  Then just top it up before 6 months (because they discontinue it if it's not topped up after 6 months) I only prepay for 1 week, which is $13 AUD. That gives me another 6 months for OTPs and SMSs.

My bank in Aus uses my Thai Phone number for OTP's and SMSs  for at least 12years now.

For verification about 6 months ago I did have to go and get my Passport verified  by an licensed Notarial Services Attorney in Thailand and Emailed the copied documents  from  My Passport and his ID and receipt of payment to the Head Office of my bank Sydney.  That was all OK.

Do US banks not handle verification through mobile apps? If there is a need for my UK bank to need verification of a debit card transaction it is carried out via my bank app. Secure messages are in the app as well. The only issue I have is that they will not post a new card to Thailand. Pointless for them to do that anyway as it has to be activated in a UK ATM before it can be used. I get it posted to my sister and she activates it. Don't need the physical card as there is a virtual card in the app.

I would probably...

 

1. Buy an UltraMobile PAYG SIM (eBay $13) and use the 100/100/100 $3/month plan using WiFi calling. Tello seems like a decent alternative in this category but I have no experience with them.

 

2. Port the existing mobile number to Google Voice.

 

But I'd need a lot more info on your usage, application requirements, current carrier/phone set up, time spent here vs. U.S.

 

For new/replacement cards I've kept my old address, and my son remails cards to my P.O. Box here. Standard airmail, Forever stamps, still working on $1.30 edition.

 

Obviously, focus on credit cards that offer zero foreign transaction fees. Research those cards' terms to see how flexible they are with you living in Thailand.

 

Having an ATM card which also has zero foreign transaction fees, and reimburses the ATM fee is good. Fidelity and Schwab seem like good options,

On 9/3/2025 at 1:14 AM, Boulderman said:

2. What do you do about security texts and verification calls, especially if you're no longer using your home country’s phone number?
I’m concerned that if I switch to a Thai SIM card, my U.S. bank might not recognize the new number and could end up locking my card or account.

Are there any good solutions out there—like apps or services—that help manage this?

I'm not from US – I'n Scandinavian – but you might be able to use the same solution as I use.

For fixed elephone line/land line I have an IP-phone, with my old land line number. That also works in Thailand, while the line appears as a local line in my home country; so, people call a number in my home country and if I call someone, it like a domestic phone call in my home country.

For mobile I keep a phone number and SIM card from my home country, using the cheapest possible subscription – for me equivalent to US$3 per month – which is mainly used to recieve SMS, like OTP and like from bank etc. I keep a cheap smartPhone – Android-13 for circa 3,500 baht – in my Thai home with that SIM-card. The phone also has the security app used to log in for net-banking and my home country's govenment web-sites.

Before I left the U.S. I signed up for a mail forwarding service, virtualpostmail.com and tried it for a bit before I moved to Thailand. I liked the service, so I changed my mailing address with my banks and credit cards to my virtualpostmail address. When it’s time for a new ATM or credit card, it gets mailed to that address. I then have virtualpostmail forward the card to me in Thailand. Activating the cards I’ve done online for most. Only one bank required me to call them to activate their card, which brings me to:

Before leaving the U.S. I got an “UltraMobile PayGo” phone number. I got it specifically as a back up to my GoogleVoice numbers. UltraMobile PayGo is not a VOIP service, so you won’t have to worry about issues with some banks short codes (2FA codes) that may not work with VOIP numbers. I can send and receive text messages and also make and receive phone calls to/from the U.S. 100 texts and 100 minutes of phone calls each month. The one-time charge for the SIM card was $13 on ebay, then it's only $3 a month for the service. I’ve had it for years and it still works great. It must be activated while you are in the U.S.

I also setup Google Voice numbers before leaving the U.S. You can get the numbers for free, and there is no monthly charge to use them. The Google Voice numbers work great for texts, and so far have worked for receiving all my banking 2FA codes. I have read a couple/few posts of people that used their Google Voice for banking codes for many years, and then their bank made some system updates and they could no longer receive the codes through a VOIP service. That’s why I got the UltraMobile PayGo number. Just as a backup. I figure $36 a year is a small price to pay to know I will receive those bank 2FA codes.

Another thing I did was get a MagicJack as my main U.S. phone number. MagicJack was originally designed to plug into your computer to make phone calls, but I’ve never used it that way as they have a mobile phone app and I can use my mobile phone to make and receive calls and text with U.S. numbers. I don’t remember what I paid for it, but it’s currently $43 for one year & $109 for 3 years. Keep checking their website as they occasionally have special offers. After my first year, there was a special on a 5 year subscription so I opted for that. MagicJack is great for phone calls and texts, BUT it does not work for banking short codes (2FA). For me it has worked for most other websites that use 2FA codes. Just not bank codes.

I also have a Thai phone number that is used only for Thailand.

Hope this information helps.

  • Author
On 9/8/2025 at 9:11 PM, BritManToo said:

1. Get a Thai bank account and debit card, then you won't need to use a foreign debit card, and most banks now allow you to create virtual debit cards if you really need to use one.

 

2. Most mobile phones have 2 SIM trays, one for your Thai SIM, one for your home country SIM. No need to change anything with your home country bank.

 

Regarding  mobile phones have 2 SIM trays... is that only available in Thailand or the US? Which mobile phone brand have 2 SIM trays? Samsung, Apple, Google? Thank you in advance.

  • Author
On 9/7/2025 at 9:38 PM, Everyman said:

 

Thank you for randomly putting words in bold. It’s not distracting or weird. 

Thank you for your response, though it didn’t really add value to the conversation

  • Author
On 9/9/2025 at 5:49 AM, srowndedbyh2o said:

Before I left the U.S. I signed up for a mail forwarding service, virtualpostmail.com and tried it for a bit before I moved to Thailand. I liked the service, so I changed my mailing address with my banks and credit cards to my virtualpostmail address. When it’s time for a new ATM or credit card, it gets mailed to that address. I then have virtualpostmail forward the card to me in Thailand. Activating the cards I’ve done online for most. Only one bank required me to call them to activate their card, which brings me to:

Before leaving the U.S. I got an “UltraMobile PayGo” phone number. I got it specifically as a back up to my GoogleVoice numbers. UltraMobile PayGo is not a VOIP service, so you won’t have to worry about issues with some banks short codes (2FA codes) that may not work with VOIP numbers. I can send and receive text messages and also make and receive phone calls to/from the U.S. 100 texts and 100 minutes of phone calls each month. The one-time charge for the SIM card was $13 on ebay, then it's only $3 a month for the service. I’ve had it for years and it still works great. It must be activated while you are in the U.S.

I also setup Google Voice numbers before leaving the U.S. You can get the numbers for free, and there is no monthly charge to use them. The Google Voice numbers work great for texts, and so far have worked for receiving all my banking 2FA codes. I have read a couple/few posts of people that used their Google Voice for banking codes for many years, and then their bank made some system updates and they could no longer receive the codes through a VOIP service. That’s why I got the UltraMobile PayGo number. Just as a backup. I figure $36 a year is a small price to pay to know I will receive those bank 2FA codes.

Another thing I did was get a MagicJack as my main U.S. phone number. MagicJack was originally designed to plug into your computer to make phone calls, but I’ve never used it that way as they have a mobile phone app and I can use my mobile phone to make and receive calls and text with U.S. numbers. I don’t remember what I paid for it, but it’s currently $43 for one year & $109 for 3 years. Keep checking their website as they occasionally have special offers. After my first year, there was a special on a 5 year subscription so I opted for that. MagicJack is great for phone calls and texts, BUT it does not work for banking short codes (2FA). For me it has worked for most other websites that use 2FA codes. Just not bank codes.

I also have a Thai phone number that is used only for Thailand.

Hope this information helps.

hanks so much for taking the time to share all of this—seriously helpful and thorough! I’ve been looking into options for maintaining my U.S. number and handling banking/security verifications while living abroad, and you covered pretty much every angle I was concerned about.

The UltraMobile PayGo tip is gold—I didn’t realize it was that affordable or that it works better than VOIP services for 2FA. Definitely worth the peace of mind for $3/month. I’ll look into grabbing one before heading out.

Also, the virtualpostmail solution for forwarding cards is a smart move. That gives me a lot more confidence in being able to manage everything from abroad without relying on family or friends back home.

Appreciate the heads-up on MagicJack limitations with bank codes too—I wouldn’t have known that. It’s good to know it still works for general calls/texts and most websites.

Really appreciate your help—this kind of info from someone who's actually living it makes a big difference.

  • Author
On 9/9/2025 at 1:36 AM, khunPer said:

I'm not from US – I'n Scandinavian – but you might be able to use the same solution as I use.

For fixed elephone line/land line I have an IP-phone, with my old land line number. That also works in Thailand, while the line appears as a local line in my home country; so, people call a number in my home country and if I call someone, it like a domestic phone call in my home country.

For mobile I keep a phone number and SIM card from my home country, using the cheapest possible subscription – for me equivalent to US$3 per month – which is mainly used to recieve SMS, like OTP and like from bank etc. I keep a cheap smartPhone – Android-13 for circa 3,500 baht – in my Thai home with that SIM-card. The phone also has the security app used to log in for net-banking and my home country's govenment web-sites.

Thanks for sharing your setup—that's a really smart and efficient way to stay connected back home while living in Thailand. I hadn’t thought about using an IP-phone to maintain a landline presence in my home country—that’s a great workaround, especially for people who still need to appear local for certain calls.

Keeping a low-cost SIM plan just for OTPs and banking makes total sense too. I like the idea of dedicating a cheap smartphone for that purpose, especially with banking apps and government portals needing secure access. Sounds like you've got a solid system that balances convenience and security.

Appreciate the insight—definitely helpful to hear what’s working well for people outside the U.S. too. Gives me a few more ideas to consider!

  • Author
On 9/8/2025 at 10:39 PM, bamnutsak said:

I would probably...

 

1. Buy an UltraMobile PAYG SIM (eBay $13) and use the 100/100/100 $3/month plan using WiFi calling. Tello seems like a decent alternative in this category but I have no experience with them.

 

2. Port the existing mobile number to Google Voice.

 

But I'd need a lot more info on your usage, application requirements, current carrier/phone set up, time spent here vs. U.S.

 

For new/replacement cards I've kept my old address, and my son remails cards to my P.O. Box here. Standard airmail, Forever stamps, still working on $1.30 edition.

 

Obviously, focus on credit cards that offer zero foreign transaction fees. Research those cards' terms to see how flexible they are with you living in Thailand.

 

Having an ATM card which also has zero foreign transaction fees, and reimburses the ATM fee is good. Fidelity and Schwab seem like good options,

Thanks a lot for the detailed breakdown—really useful stuff. The UltraMobile PAYG option for $3/month is looking more and more like a solid backup plan, especially for those 2FA texts and WiFi calling. I’ve heard of Tello but haven’t dug into it yet either—might be worth a look just to compare.

Porting my current number to Google Voice is something I’ve been seriously considering too—it’s good to hear that setup seems to be working well for others.

Also appreciate the tip on keeping your old U.S. address and having family forward cards—that’s a simple solution that still works without overcomplicating things. I’ll probably look into that or a mail forwarding service depending on logistics.

And yes—absolutely agree on the no-foreign-transaction-fee cards. I’ve started looking into ones that are more expat-friendly. Schwab and Fidelity are now on my radar thanks to your mention.

Thanks again—really appreciate you sharing your setup and recommendations.

  • Author
On 9/8/2025 at 9:44 PM, alanrchase said:

Do US banks not handle verification through mobile apps? If there is a need for my UK bank to need verification of a debit card transaction it is carried out via my bank app. Secure messages are in the app as well. The only issue I have is that they will not post a new card to Thailand. Pointless for them to do that anyway as it has to be activated in a UK ATM before it can be used. I get it posted to my sister and she activates it. Don't need the physical card as there is a virtual card in the app.

Thanks for sharing that—sounds like the UK banking system is a bit more streamlined in that regard. Unfortunately, many U.S. banks still rely heavily on SMS for 2FA and transaction verification, and not all of them have fully embraced secure in-app messaging or virtual card setups as standard. Some are getting there, but it's definitely not consistent across the board.

That’s a smart workaround using your sister to activate the card locally. And having a virtual card in the app is a big plus—wish more U.S. banks made that standard practice. For now, it feels like we’re juggling multiple services just to get close to that level of flexibility.

Appreciate the insight—it’s always helpful to hear how other countries handle this kind of thing. Gives a good perspective on what might improve over time here.

On 9/2/2025 at 4:14 PM, Boulderman said:

2. What do you do about security texts and verification calls, especially if you're no longer using your home country’s phone number?

Go to your US Bank and ask about the new device for out of country verifications. It's called an RSA security device.  I got mine from W.F. Bank and it works perfectly for making wire transfers and if you happen to use a different computer to sign into your accounts.

On 9/14/2025 at 4:20 AM, Boulderman said:

Regarding  mobile phones have 2 SIM trays... is that only available in Thailand or the US? Which mobile phone brand have 2 SIM trays? Samsung, Apple, Google? Thank you in advance.

 

My last few phones have had 2 SIM trays.  Huawei and Redmi phones purchased in the UK.  My latest doesn't but has esim capability which more than makes up for it.

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