Radio permit stamps were used to confirm the payment of radio license fees. The 4 Złoty fee had to be paid monthly at the post office.

Upon payment, one stamp was placed on the license, and the second stamp was affixed to a verification form kept at the post office.

Radio permit stamps were used to confirm the payment of radio license fees. The 4 Złoty fee had to be paid monthly at the post office.

Upon payment, one stamp was placed on the license, and the second stamp was affixed to a verification form kept at the post office.