MPEP § 2002.02 — Must be in Writing (Annotated Rules)

§2002.02 Must be in Writing

USPTO MPEP version: BlueIron's Update: 2026-01-10

This page consolidates and annotates all enforceable requirements under MPEP § 2002.02, 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.

Must be in Writing

This section addresses Must be in Writing. Primary authority: 37 CFR 1.2, 37 CFR 1.56, and 37 CFR 1.4(b)). Contains: 1 requirement and 3 other statements.

Key Rules

Topic

Signature Requirements

2 rules
StatutoryRequiredAlways
[mpep-2002-02-fc87fe6f125db119a8501412]
Written Disclosure Required for Each Application
Note:
A disclosure under 37 CFR 1.56 must be in writing and filed in each relevant application or proceeding.

A disclosure under 37 CFR 1.56 must be in writing as prescribed by 37 CFR 1.2, and a copy of any such disclosure must be filed in each application or other proceeding to which the disclosure pertains (37 CFR 1.4(b)). “The presentation to the Office (whether by signing, filing, or submitting) of any paper by a party, whether a practitioner or non-practitioner, constitutes a certification under § 11.18(b).” 37 CFR 1.4(d)(4)(i). 37 CFR 11.18(b) includes paragraph (b)(2), which calls for a duty of reasonable inquiry to ensure that the paper is not being presented for any improper purpose, the legal contentions are warranted by law, the allegations and other factual contentions have evidentiary support, and the denials of factual contentions are warranted on the evidence.

Jump to MPEP Source · 37 CFR 1.56Signature RequirementsCertification – Factual SupportCertification – Not for Improper Purpose
StatutoryInformativeAlways
[mpep-2002-02-e4cc40809d71e9320166bedb]
Disclosure Must Be In Writing
Note:
A disclosure under 37 CFR 1.56 must be presented in writing and filed in each relevant application.

A disclosure under 37 CFR 1.56 must be in writing as prescribed by 37 CFR 1.2, and a copy of any such disclosure must be filed in each application or other proceeding to which the disclosure pertains (37 CFR 1.4(b)). “The presentation to the Office (whether by signing, filing, or submitting) of any paper by a party, whether a practitioner or non-practitioner, constitutes a certification under § 11.18(b).” 37 CFR 1.4(d)(4)(i). 37 CFR 11.18(b) includes paragraph (b)(2), which calls for a duty of reasonable inquiry to ensure that the paper is not being presented for any improper purpose, the legal contentions are warranted by law, the allegations and other factual contentions have evidentiary support, and the denials of factual contentions are warranted on the evidence.

Jump to MPEP Source · 37 CFR 1.56Signature RequirementsCertification – Factual SupportCertification – Not for Improper Purpose
Topic

Practitioner Certification Requirements

1 rules
StatutoryInformativeAlways
[mpep-2002-02-904981d1b0e4d98a9712903c]
Presentation of Paper Constitutes Certification
Note:
The submission of any paper to the Office by a party, whether a practitioner or non-practitioner, constitutes a certification under §11.18(b) that it is not for an improper purpose and has evidentiary support.

A disclosure under 37 CFR 1.56 must be in writing as prescribed by 37 CFR 1.2, and a copy of any such disclosure must be filed in each application or other proceeding to which the disclosure pertains (37 CFR 1.4(b)). “The presentation to the Office (whether by signing, filing, or submitting) of any paper by a party, whether a practitioner or non-practitioner, constitutes a certification under § 11.18(b).” 37 CFR 1.4(d)(4)(i). 37 CFR 11.18(b) includes paragraph (b)(2), which calls for a duty of reasonable inquiry to ensure that the paper is not being presented for any improper purpose, the legal contentions are warranted by law, the allegations and other factual contentions have evidentiary support, and the denials of factual contentions are warranted on the evidence.

Jump to MPEP Source · 37 CFR 1.56Practitioner Certification RequirementsPractitioner Conduct and CertificationPractitioner Signature and Certification
Topic

Certification – Factual Support

1 rules
StatutoryInformativeAlways
[mpep-2002-02-4d8d2744ce6ef795c14e91f6]
Requirement for Factual Support and Legal Warrantiness in Paper Presentation
Note:
This rule requires that any paper presented must be supported by evidence, warranted by law, and not for an improper purpose.

A disclosure under 37 CFR 1.56 must be in writing as prescribed by 37 CFR 1.2, and a copy of any such disclosure must be filed in each application or other proceeding to which the disclosure pertains (37 CFR 1.4(b)). “The presentation to the Office (whether by signing, filing, or submitting) of any paper by a party, whether a practitioner or non-practitioner, constitutes a certification under § 11.18(b).” 37 CFR 1.4(d)(4)(i). 37 CFR 11.18(b) includes paragraph (b)(2), which calls for a duty of reasonable inquiry to ensure that the paper is not being presented for any improper purpose, the legal contentions are warranted by law, the allegations and other factual contentions have evidentiary support, and the denials of factual contentions are warranted on the evidence.

Jump to MPEP Source · 37 CFR 1.56Certification – Factual SupportCertification – Not for Improper PurposeCertification – Legal Contentions Warranted

Citations

Primary topicCitation
Certification – Factual Support
Practitioner Certification Requirements
Signature Requirements
37 CFR § 1.2
Certification – Factual Support
Practitioner Certification Requirements
Signature Requirements
37 CFR § 1.4(b)
Certification – Factual Support
Practitioner Certification Requirements
Signature Requirements
37 CFR § 1.4(d)(4)(i)
Certification – Factual Support
Practitioner Certification Requirements
Signature Requirements
37 CFR § 1.56
Certification – Factual Support
Practitioner Certification Requirements
Signature Requirements
37 CFR § 11.18(b)

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: 2026-01-10