A friend needs some advice:

Whilst rummaging through some documentation he came across his 18 month old’s passports and to his horror saw that his TW had used the babies British passport on their return to Thailand from the UK after visiting him 6 months ago.

The baby is now on a 5 month overstay. He does not place any blame on TW as she is not well travelled and he had not told her to use the Thai passport on their return trip.

My first thought is that he should do a quick trip with them to Singapore or wherever and pay the 20K Baht fine to get it sorted. Is there another alternative?

You have gotta wonder what is going through the minds of the Immigration Officers seeing a woman on a Thai passport enter the Kingdom with a baby to whom they are giving a 30 visitors visa. Why did they not ask the woman if the baby had a Thai passport?

Children below the age of 14 years can not and will not be charged for overstay.

Your friend does not need to worry, next trip use the UK Passport to leave the country.

Children below the age of 14 years can not and will not be charged for overstay.

Your friend does not need to worry, next trip use the UK Passport to leave the country.

Good news, thank you for this.

There is likely to be a stamp put into the passport however that the child was on overstay so allow a couple of extra minutes on departure for that.

Children below the age of 14 years can not and will not be charged for overstay.

Your friend does not need to worry, next trip use the UK Passport to leave the country.

I am from Finland and my thai wife and daughter (5 month) are coming to thailand soon for 3 months. Our baby have finnish passport. Can somebody confirm that my daughter dont need visa for that overstay and encounter any problem entering/leaving thailand?

I am following them later after couple of month and we come back together.

I had to read your post five times as you said "finnish" passport and kept thinking her passport had been made so she could use it - now believe you mean she has a Finnish Passport and will use that to enter Thailand. The airline could require she have a tourist visa but there will not be any problem of overstay payments on leaving Thailand. It would be best to get her a tourist visa to prevent any problem at the airport leaving Finland.

I was thinking because we still have some time, I could get she thai passport before they go. Then she would have both finnish and thai passport. Showing both of them at immigrations/passport controls would eliminate visa problem? And new passport and visa are almost same price.

If your child enters Thailand on foreign passport there is no overstay for the child if the mother is Thai of course.

My son entered Thailand on European passport 30 stamp and my wife did border runs to "keep him legal" on the third and final run the immigration officer recognised her and asked her why she was doing this. All was explained and after he picked himself up off the floor laughing told her he would not be overstaying. Next time it would be better if entered Thailand on his Thai passport.

I did not believe her went to immigration in person and they confirmed that children of Thai nationals will not be classed as overstay. He has Thai passport Thai birth cert as well as farnag ones he entered on the foreign passport. You can relax.

It has nothing to do with being Thai - no children are subject to overstay fines.

sasinapa: get her the Thai passport but leave Finland using Finnish passport - if airline questions lack of visa show the Thai passport to prove able to enter. Then put Finnish passport away and use the Thai passport for entry into Thailand. When you all leave Thailand you use the Thai passport to leave but will have to show the Finnish passport to the airline check-in staff along with the Thai passport. When you get back to Finland use the Finnish passport to enter.

Simplet rule is use passport of country you enter/exit.

Now I start to do passport and did find out that new passport is only 35€ (can get in 3 weeks) and NON-IMMIGRANT "O" visa 45€ and have enough time to make new passport, so that's what I shall do.

Thanks for the advice to everyone!