Pretty sure the answer is yes ... I had to get my late wife's death certificate couriered over to Thailand when I got married so the Canadian Embassy could write me that affidavit.

The Canadian embassy needed a copy of my tax returns showing my status as single.

If you are also applying for a marriage visa you will probably need to show evidence of income (I was still working so my last years tax returns and a salary letter from my employer both of which I was luckily able to just download remotely ... if you are retired then not sure what you will need as I am 'grandfathered' in and they didn't ask me to show anything but my bank statements at renewal time.

@Toohotma *******

no, in the 3 years I've been here dealing with Thai government and immigration (certificates, visas, house books, IDs, licenses, home purchase, garbage pickup, electrical, internet, water hookup, etc, I have yet to been asked for any extra money. once some guy selling fish charged me an extra 20 baht. I'm not in a tourist area (Chiang Mai, but not in town) so maybe it's different when they have to deal with tourists?

don't use the ATMs, go to the bank attendants and get them to do the withdrawal manually ... also saves the 200 baht free I hear.

yes, back in 2020 i faced the same issue. the only Ampur that would deal with us was the one in the area we lived in. she owed houses and property in other jurisdictions but even they wouldn't deal with us and sent us back to the local one. the problem there was the main manager there was on a 3 month trip to Bangkok to celebrate something to do with the King (his inauguration IIRC) so we couldn't get the certificate signed for another 3 months.