So FH is from Poland, and I have to send 15 invitations there.
FMIL gave me all the addresses and the names, I know it's a stupid question, but idk how to send them there? Do I just put a stamp and just drop them to the post office? Do I pay?
I asked FH and he said he never sent anything there so he has no idea how it works.
If you guys have any advice I would appreciate it