Do we need to report our address after staying in a hotel in another province?

Vincent Vanmilingen, I didn't read all the comments so forgive me if I missed it.

What immigration office would you be using? <- meaning seeing as thailand is 513+ thousand square kilometers in size how about narrowing it down a bit so you can get a real answer ;)

And the only one who can tell you if you need to report or not is the Immigration Office in your area. Every Immigration Office enforce in different ways. So it is only confusing if you read stories about total different area's and don't ask by your self at the Immigration Office in your area.

Yes, you are required to.