Yes. The party (your employer) may submit an application for issuing a duplicate of your work permit, confirmed as being true to the original. The stamp duty for issuing a duplicate of a decision is 5PLN for each started page of the decision (so if the decision has two pages, the fee for its duplicate will be 10PLN).
Payments for stamp duty should be made to the bank account of the Poznań City Hall:
Poznań City Hall Financial Department
Other Tax and Non-Tax Income Section, 61-706 Poznań, ul. Libelta 16/20