How Fast Is Regular Post In Poland?

Hello

An important document has been sent from Poznan to my temporary address in Suwalki. The email I received from the sender says 'The letter was sent today to your address. It will arrive within a few days by regular mail delivered by the Polish Post.'

How long does regular mail delivery usually take in Poland? Can it take longer than 3 days? Thank You.

It may but it's rather shouldn't.

Thank you, Lenka

Since I received this email on 26th in the morning so hopefully it will arrive tomorrow.

If it won't arrive tomorrow you'll probably have it on monday.