I've "searched" this question but without a decent answer, so......

I know that it is necessary to give the address staying in Thailand when arriving, and we all just give the first ( if known ) hotel, but now I'm living with my TGF in a rented room. I'm on the first of a double entry tourist visa.

My queries are- should I go to the police station to report my address, or just wait till my visa extension?

If I don't report it, will there be any repercussions for myself or my GF? Do I need to get the landlady to fill in a form TM 30?

Thanks for any helpful answers.

The landlady is responsible for reporting you, but if not a hotel they probably will not. I would not worry about it on a tourist visa entry.

thanks.