When reading guidelines for new insurance requirement it seems if you get retirement visas while visiting home country you do not need thaicompanies at all?

 

Source:
https://longstay.tgia.org/home/guidelineoa

 

Quote

Guidelines Non-Immigrant Visa (O-A).
Applicant must be aged 50 years old and over (on the day of visa submission application)
This visa is allowed to stay in Thailand for 1 year each time.
Health insurance policy must have coverage not less than 400,000 Thai Baht per policy year for Inpatient, and not less than 40,000 Thai Baht per policy year for outpatient.
In the case where the accompanying spouse is not eligible to apply for the O-A visa, he or she will be considered for temporary stay under Category “O” visa. A marriage certificate must be provided as evidence.
First year, all applicants can buy health insurance from insurance companies in their owned countries or authorized insurance company in Thailand. When the applicants want to renew the visa, the applicants must buy insurance from authorized insurance companies in Thailand only. Any inquiries on completing Insurance application can be addressed at each insurance company.

 

You can only buy an O-A visa in your home country. This website has a pdf you download to certify that a foreign insurance company meets the Thai insurance requirements.

 

http://longstay.tgia.org/home/companiesoa

 

 have no idea if it will work. Give it a try.

Technically you can use insurance issued anywhere but you have to show proof of it and it must meet the requirements to apply for the OA visa.

On this page https://longstay.tgia.org/home/companiesoa of the same site you will see this at top of it 

Download Overseas Insurance Certificate .

You could try to get the certificate if your policy meets the minimum coverage.