Because I renewed my retirement visa during the 90 day period, with all manner of documents.

I believed that would be evidence of being here and at same adress..But it's not.. my mistake, so I was fined

when I went to report 90 days (actually a few weeks less) from my visa visit. I'm not complaining

just letting anyone else as dumb as me to take note.

Only the first application for extension of stay is counted as a 90 day address report. After that you must make a TM.47 report every 90 days unless you leave Thailand (count starts at one on return).

A friend of mine was equally confused when he renewed an extension and assumed that also counted as a 90 day report. Fined.

So basically if you haven't filled in a TM 47 form and handed it to the officer ( no matter the other paperwork of yours he/she may have with your address on ) you haven't reported.