39 CFR § 265.4 - Responsibility for responding to requests.
(a) In general. When a request is received, the FOIA RSC will either respond to the request, or refer the request to the appropriate FOIA RSC or records custodians. The FOIA RSC will advise the requester of any such referral. The Postal Service, the Office of Inspector General of the Postal Service, and the Postal Inspection Service, respectively, are responsible for responding to requests they receive for records they maintain. Records responsive to a request ordinarily will include only records in the Postal Service's possession as of the date of the search. If any other date is used, the Postal Service shall inform the requester of that date. A record that is excluded from the requirements of the FOIA pursuant to 5 U.S.C. 552(c) is not considered responsive to the request.
(b) Authority to grant or deny requests. The records custodian of the requested record, or his designee, is authorized to grant or to deny the request. FOIA RSC staff may also grant or deny requests.
(c) Receipt and tracking of requests. FOIA RSCs are responsible for the initial receipt and tracking of FOIA requests.
(d) Acknowledgments of requests. FOIA RSCs must acknowledge the request in writing and assign it an individualized tracking number if it will take longer than 10 working days to process. The acknowledgement of the request must include a brief description of the records sought to allow requesters to more easily keep track of their requests.