# Sectigo — TLS certificate maximum validity by Certificate Authority: what each CA actually issues today

For Sectigo, maximum validity (days) is 199; still issuing tls certificates is yes; notes is 199 days is described as 6 months plus extra time to renew. Domain Control Validation reuse is limited to 198 days from the same date. Sectigo acquired Entrust's public certificate business (completed September 18, 2025), recorded from its source on 2026-08-18.

- **Certificate Authority:** Sectigo _(verified: appears in the quote below)_
- **Maximum validity (days):** 199 _(verified: appears in the quote below)_
- **Still issuing TLS certificates:** yes _(our reading, not quoted from the source)_
- **Notes:** 199 days is described as 6 months plus extra time to renew. Domain Control Validation reuse is limited to 198 days from the same date. Sectigo acquired Entrust's public certificate business (completed September 18, 2025). _(our reading, not quoted from the source)_

## What the source says

> To align with evolving industry requirements, Sectigo will begin enforcing a maximum TLS certificate validity of 199 days starting March 12, 2026.

## Source

- https://www.sectigo.com/resource-library/shorter-validity-periods-for-tls-certificates-and-dcv

Last verified: 2026-08-18. Review by: 2026-09-17.
Part of [TLS certificate maximum validity by Certificate Authority: what each CA actually issues today](https://referencesource.org/ca-issuance-validity/).