DO respond quickly to any bureau request for more SASE or additional postage. Remember, unclaimed cards are the bureau's single biggest problem. DO include an SASE with any information request to the bureau. DO notify the bureau in writing if you don't want your cards. DON'T expect DX cards to arrive for at least a year after contact.
Overseas delivery is very slow.
Most cards are over a year old when received by the Bureau. DON'T send your outgoing cards to this bureau. Click on the link to find out about the ARRL outgoing bureau service.