Knowledge Base

Advisory Notices

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How to Create a DNS BIMI record

Updated on November 12, 2025
946 people found this helpful
How to Create a DNS BIMI record

VMC and CMC Certificates Validation

Updated on November 12, 2025
810 people found this helpful
Legal Existence for VMC/CMC

VMC and CMC Certificates - Eligibility Requirements

Updated on November 12, 2025
969 people found this helpful
Minimum requirements for mark certificates

Replacement and Reissue of VMC and CMC Certificates

Updated on November 12, 2025
769 people found this helpful
Guidelines for replacement of VMC/CMC

Certificate Request and Approval Workflow for VMC and CMC

Updated on November 12, 2025
628 people found this helpful
Clarification about SA CRF for VMC/CMC

Access New Sectigo Public Certificate Chain

Updated on October 20, 2025
1968 people found this helpful
Access New Sectigo Public Certificate Chain

Banned Country List

Updated on August 21, 2024
13372 people found this helpful
Currently, secure certificates of any type CANNOT be issued to individuals or business entities in the following countries, websites, or the following country-code-top-level domains (TLDs):

What is a Method of Communication (MOC) for callback validation?

Updated on September 16, 2026
53 people found this helpful
The verified telephone numbers and email addresses Sectigo accepts for callback validation, and the sources those details must come from.

How to find and complete the Sectigo Subscriber Agreement

Updated on September 9, 2026
32 people found this helpful
How a certificate applicant locates the Sectigo Subscriber Agreement link and accepts the agreement so the order can move forward.

What Is the Process for Validating Attorney and CPA Letters?

Updated on August 24, 2026
58 people found this helpful
This article explains when a CPA Letter or Legal Opinion Letter may be used during organization validation, the requirements that apply to these letters, how Sectigo verifies the signatory and letter authenticity, and the mandatory content that must be included.

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