Knowledge Base

Learn how to securely sign PDF documents in Bluebeam Revu with a step-by-step guide. Includes prerequisites, digital ID setup, signature field creation, and authentication for compliance and document integrity.

Learn how to achieve DMARC compliance for Verified Mark Certificates (VMC). This guide explains DMARC, its importance for email security, and step-by-step instructions for configuring SPF, DKIM, and DMARC records.

Learn how to securely sign Microsoft Word documents using a digital signature and a document signing certificate. This step-by-step guide ensures authenticity, accountability, and integrity for official or sensitive files.

Learn the step-by-step process to add a digital signature to a PDF using Adobe Acrobat Reader DC. Includes instructions for selecting your certificate and signing securely.

Access New Sectigo Public Certificate Chain

WHOIS Email DCV Deprecation

Understanding Certificate Transparency (CT) Logs and Precertificates

Enterprise Public Key Infrastructure (E-PKI) Manager User guide

Sectigo customers request a Verified Mark Certificate (VMC) through the Sectigo shopping page and a guided certificate ordering wizard.

Format your brand logo to meet VMC requirements — the logo must be in SVG Tiny PS profile and follow specific size, shape, and color rules so email clients can display it next to your sender's name.