Where to get certificate of family composition (gezinssamenstelling attest) in Poland?

hello there ..could some advice me from where i can get family composition certificate in poland ..i am a eu citizen who was living in poland (lodz ) from sept 2016 untill march 2018 with my mother ( she was living as a dependent of a eu citizen &holdig a residence card of a dependent of eu citizen )..now when i am beck in my home state (belgium )& want to register my mother in belgium ..& belgian city council ask me to bring certificate of family composition (attest van gezinssamentelling) from poland where i lived with my mother in same house hold ....no one seems no one in polish city council seems to know this paper ..thnx in advance bopprai

What you need is a document stating who lived on your address. A quick round of google shows me that there is a very good chance you have to get it not from the Polish city council, but for some reason from the Belgian embassy in Poland.

Sounds a bit strange to me, but then again i've had more strangeness in Poland and we're practically neighbours (Nederland)

Actually, check document E401 mpips.gov.pl/gfx/mpips/userfiles/File/mps/koordynacja/E401.pdf from Polish gov.

On subscript 12 it states you get the proof of composition of your family from the Polish city council....