How should correspondence be addressed for matters not specific to patents or trademarks?

For correspondence that is not specific to patents or trademarks, such as requests for certified copies or assignment recordation, the general mailing address is:

Director of the United States Patent and Trademark Office
P.O. Box 1450
Alexandria, VA 22313-1450

This address should be used for:

• Patent and trademark documents sent to the Assignment Division for recordation (Mail Stop Assignment Recordation Services)
• Requests for certified or uncertified copies of patent and trademark documents (Mail Stop Patent and Trademark Copy Fulfillment Branch)
• Correspondence for which an address is not otherwise specified in 37 CFR 1.1 or 2.190

MPEP 501 states: “For correspondence for which an address is not otherwise specified in 37 CFR 1.1 or 2.190, should be addressed to: Director of the United States Patent and Trademark Office, P.O. Box 1450, Alexandria, VA 22313-1450”