Many of us are pensioners from Denmark, who are offset against the pension, when we settle outside Europe.
The remaining amount is not enough as income documentation to extend the annual visa, therefore we have to use an agent, who can help solve the problem.
It may be slightly different in the different provinces. I had been on a weekend trip to the neighboring province, and a month later I was reporting to my home province.
I was still registered with Immigration in the neighboring province and was told to approach immigration there.
I told them that I still lived in the same place, after which I was fined 2000 Baht for not reporting my return from the neighboring municipality.
I managed the matter by explaining that I was on my way home and just wanted to report my return.
When asked where I had spent the night in the intervening time, I replied that I had been on a motorcycle camping trip and spent the night in my tent around the national parks.
They took that explanation for good goods, and I escaped further prosecution and kept my 2000 Baht.