We use a Post Office Box number. This is used so that we do not have to give out our home address over the air. It can help because overseas operators get to know the P.O.Box address and if conditions are difficult it can make the difference in getting that QSL exchange. We have our group QSL cards in different colours.
Many operators also have cards printed to their own design.
10 Code, Q Code, Membership list and other bit's. Click here for application form that you can print out and fill in. PO30 5WF, England. At the Riverside Centre, Newport, Isle of Wight. This is the original colour card, Now printed in 8 colours.