First, welcome to PF and congrats on the nuptials-to-be! If you're in the Poznan area, the bachelor party's definitely on!
I'm definitely no expert on this sort of stuff, but I'll do my best to find out some answers for you unless someone else on the forum gets back to you faster (as I'm sure they will).
Before I go searching for some more answers, check out this thread posted back in the day:
https://polishforums.com/law/poland-foreigners-getting-married-guide-17361/