Slovak Post has changed the delivery address for QSL service. Instead of P.O.Box 1, there is now P.O.Box 125. The postal code has also changed to 85000. The new address is therefore as follows:
SARA QSL bureau
P.O.Box 125
85000 Bratislava
Use the new address starting today. Shipments sent to the original P.O.Box 1 will be automatically redirected to the new address during the transition period, so you don't have to worry about them getting lost.
Source: http://www.hamradio.sk/