I have the opposite problem since the formal/informal distinction is basically alien to me, I have a habit of retreating to Pan/Pani (because I sometimes forget which I use with a particular person). It's especially embarrassing when a person addresses me (and my American brain understands without noticing whether they used 'ty' or 'pan')
Also, occasionally I have the problem of genuinely not knowing which to use (Polish speakers tell me they have the same problem some times). The wealth of impersonal constructions in Polish are a real godsend then.
Also, occasionally I have the problem of genuinely not knowing which to use (Polish speakers tell me they have the same problem some times). The wealth of impersonal constructions in Polish are a real godsend then.