MPEP § 2542 — Change of Correspondence Address (Annotated Rules)

§2542 Change of Correspondence Address

USPTO MPEP version: BlueIron's Update: 2025-12-31

This page consolidates and annotates all enforceable requirements under MPEP § 2542, including statutory authority, regulatory rules, examiner guidance, and practice notes. It is provided as guidance, with links to the ground truth sources. This is information only, it is not legal advice.

Change of Correspondence Address

This section addresses Change of Correspondence Address. Primary authority: 37 CFR 1.33), 37 CFR 1.36, and 37 CFR 1.33. Contains: 1 requirement, 1 guidance statement, and 6 permissions.

Key Rules

Topic

Correspondence Address Requirements

7 rules
StatutoryRequiredAlways
[mpep-2542-3027b51952ca315706eac4dd]
Patent Correspondence Must Go to Designated Address
Note:
Notices and communications about the patent will be sent to the designated address unless a fee address is provided or changed.

Unless a fee address has been designated, notices, receipts, and other communications relating to the patent will generally be directed to the correspondence address (37 CFR 1.33) used during the prosecution of the application. Practitioners of record when the patent issues who do not wish to receive correspondence relating to maintenance fees must change the correspondence address in the patented file or provide a fee address to which such correspondence should be sent. It is not required that a practitioner file a request for permission to withdraw pursuant to 37 CFR 1.36 solely for the purpose of changing the correspondence address in a patented file.

Jump to MPEP Source · 37 CFR 1.33)Correspondence Address RequirementsCorrespondence with the OfficeCorrespondence Address
StatutoryRecommendedAlways
[mpep-2542-febc18edf87f0e1959fc7178]
Change Correspondence Address Timely
Note:
The rule requires updating the correspondence address to ensure timely receipt of all communications.

The correspondence address should be updated or changed as necessary to ensure that all communications are received in a timely manner. A change of correspondence address may be made as provided in pre-AIA 37 CFR 1.33(a) or 37 CFR 1.33(a). The correspondence address may be changed as provided in pre-AIA 37 CFR 1.33(a)(1) prior to the filing of an oath or declaration. After an oath or declaration has been executed and filed by at least one inventor, the correspondence address may be changed as provided in pre-AIA 37 CFR 1.33(a)(2).

Jump to MPEP Source · 37 CFR 1.33(a)Correspondence Address RequirementsCorrespondence with the OfficeCorrespondence Address
StatutoryPermittedAlways
[mpep-2542-8c18f8dc0226f1f893a5ab84]
Correspondence Address Change Requirement
Note:
The correspondence address must be updated as provided in pre-AIA 37 CFR 1.33(a) before or after filing an oath or declaration.

The correspondence address should be updated or changed as necessary to ensure that all communications are received in a timely manner. A change of correspondence address may be made as provided in pre-AIA 37 CFR 1.33(a) or 37 CFR 1.33(a). The correspondence address may be changed as provided in pre-AIA 37 CFR 1.33(a)(1) prior to the filing of an oath or declaration. After an oath or declaration has been executed and filed by at least one inventor, the correspondence address may be changed as provided in pre-AIA 37 CFR 1.33(a)(2).

Jump to MPEP Source · 37 CFR 1.33(a)Correspondence Address RequirementsCorrespondence with the OfficeCorrespondence Address
StatutoryPermittedAlways
[mpep-2542-05a19ba323108a164c5232ca]
Change Before Oath/Declaration Filing
Note:
The correspondence address can be changed before filing an oath or declaration.

The correspondence address should be updated or changed as necessary to ensure that all communications are received in a timely manner. A change of correspondence address may be made as provided in pre-AIA 37 CFR 1.33(a) or 37 CFR 1.33(a). The correspondence address may be changed as provided in pre-AIA 37 CFR 1.33(a)(1) prior to the filing of an oath or declaration. After an oath or declaration has been executed and filed by at least one inventor, the correspondence address may be changed as provided in pre-AIA 37 CFR 1.33(a)(2).

Jump to MPEP Source · 37 CFR 1.33(a)Correspondence Address RequirementsCorrespondence with the OfficeCorrespondence Address
StatutoryPermittedAlways
[mpep-2542-f31a7e73fe58ddb4de01bcaf]
Correspondence Address Change After Oath/Declaration
Note:
Allows changing the correspondence address after an oath or declaration is filed by at least one inventor.

The correspondence address should be updated or changed as necessary to ensure that all communications are received in a timely manner. A change of correspondence address may be made as provided in pre-AIA 37 CFR 1.33(a) or 37 CFR 1.33(a). The correspondence address may be changed as provided in pre-AIA 37 CFR 1.33(a)(1) prior to the filing of an oath or declaration. After an oath or declaration has been executed and filed by at least one inventor, the correspondence address may be changed as provided in pre-AIA 37 CFR 1.33(a)(2).

Jump to MPEP Source · 37 CFR 1.33(a)Correspondence Address RequirementsCorrespondence with the OfficeCorrespondence Address
StatutoryPermittedAlways
[mpep-2542-c37a1f5f476dd8f2ad4d6414]
Request for Change of Correspondence Address
Note:
Use the Office form, PTO/SB/122, to request a change in correspondence address during the patent's life.

Requests for a change of the correspondence address may be sent to the Office of Patent Application Processing during the enforceable life of the patent. To ensure accuracy and to expedite requests for change to the correspondence address, it is suggested that the request include both the patent number and the application number. The Office form, Change of Correspondence Address, Application (PTO/SB/122) may be used to request a change of correspondence address in a patent application. The Office form, Change of Correspondence Address, Patent (PTO/SB/123) may be used to request a change of correspondence address for an issued patent.

Jump to MPEP SourceCorrespondence Address RequirementsCorrespondence with the OfficeCorrespondence Address
StatutoryPermittedAlways
[mpep-2542-a5d06a821208e195a04c5f64]
Request for Change of Patent Correspondence Address
Note:
Requests for changing the correspondence address for an issued patent must include the patent number and can be submitted to the Office of Patent Application Processing.

Requests for a change of the correspondence address may be sent to the Office of Patent Application Processing during the enforceable life of the patent. To ensure accuracy and to expedite requests for change to the correspondence address, it is suggested that the request include both the patent number and the application number. The Office form, Change of Correspondence Address, Application (PTO/SB/122) may be used to request a change of correspondence address in a patent application. The Office form, Change of Correspondence Address, Patent (PTO/SB/123) may be used to request a change of correspondence address for an issued patent.

Jump to MPEP SourceCorrespondence Address RequirementsCorrespondence with the OfficeCorrespondence Address
Topic

Identifying the Application

1 rules
StatutoryPermittedAlways
[mpep-2542-32359cb29b0f84211e055c5e]
Request for Change Must Include Patent and Application Numbers
Note:
When requesting a change of correspondence address, the request must include both the patent number and application number to ensure accuracy and expedite processing.

Requests for a change of the correspondence address may be sent to the Office of Patent Application Processing during the enforceable life of the patent. To ensure accuracy and to expedite requests for change to the correspondence address, it is suggested that the request include both the patent number and the application number. The Office form, Change of Correspondence Address, Application (PTO/SB/122) may be used to request a change of correspondence address in a patent application. The Office form, Change of Correspondence Address, Patent (PTO/SB/123) may be used to request a change of correspondence address for an issued patent.

Jump to MPEP SourceIdentifying the ApplicationCorrespondence Address RequirementsCorrespondence with the Office

Citations

Primary topicCitation
Correspondence Address Requirements37 CFR § 1.33
Correspondence Address Requirements37 CFR § 1.33(a)
Correspondence Address Requirements37 CFR § 1.33(a)(1)
Correspondence Address Requirements37 CFR § 1.33(a)(2)
Correspondence Address Requirements37 CFR § 1.36

Source Text from USPTO’s MPEP

This is an exact copy of the MPEP from the USPTO. It is here for your reference to see the section in context.

BlueIron Last Updated: 2025-12-31