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Renew or activate signature

Electronic signature activation

How to activate NEW
Certum's electronic signature?

Activate a Signature

Electronic signature renewal

Renewal of Certum's e-signature
step by step

Renew a Signature

Electronic signature renewal process - detailed instruction

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Technical announcements

02.09.2026

Important Information Regarding One-Time Qualified Signatures

Following the next CertumSign platform update, scheduled for September 25-28, 2026, a single one-time qualified signature will be available for purchase. Currently, one-time qualified signatures are offered exclusively in packages of 5, 10, or 20 signatures.

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22.06.2026

Maintenance Work on the CertumSign Service

Please be advised that maintenance work will be performed on the CertumSign platform. As a result, it will not be possible to log in to the CertumSign service from 8:00 PM on Friday, June 26, 2026, until 6:00 AM on Monday, June 29, 2026.

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21.10.2025

Sunsetting the clientAuth EKU from Certum SSL/TLS certificates

From October 2025, the SSL/TLS certificate industry is undergoing a significant change – public SSL/TLS certificates will no longer include the Extended Key Usage (EKU) TLS Web Client Authentication (clientAuth) extension. This certificate extension allowed a single SSL/TLS certificate to be used for both server and client authentication in mutual TLS (mTLS) scenarios.

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