DO include a SASE with any information request to the bureau. DO notify the bureau in writing if you don't want your cards. DO notify your bureau of a change in address. Don'ts DON'T send domestic US to US cards to the various call-area bureaus. Overseas delivery is very slow.
Many cards coming from overseas bureaus are over a year old.
DON'T send your outgoing DX cards to your call-area bureau. DON'T send SASEs or money credits to the ARRL Outgoing QSL Service. DON't send SASEs larger than 6 x 9 inches. SASEs larger than this require additional postage surcharges. This address can also be used to send comments or general questions to the W1 QSL Bureau Manager.