Customer service Billing:

Monday — Friday:
9:00 - 18:00 CET time

Technical Support:

Monday — Friday:
9:00 - 18:00 CET time

Ordering system/certificate issuance:

24/7

LeaderTelecom B.V. is VAT-registered with the UK’s HM Revenue and Customs (HMRC) and has a UK VAT number (GB373878249) , so we can charge UK VAT as normal. All invoices for UK customers now include 20% VAT, although still denominated in EUR as the company’s tax residency is the Netherlands.

News

20-05-26

RDP File Signing: What Has Changed After the April 2026 Updates

After the April updates (CVE-2026-26151), Windows takes a stricter approach to RDP connections: redirections are now disabled by default, and unsigned RDP files come with explicit warnings.

15-05-26

CA/B Forum CSC-32 Enters IPR Review

CA/B Forum ballot CSC-32 is in 30-day IPR Review: if adopted, every Code Signing certificate issued on or after 15 September 2026 must contain exactly one CA/B Forum Reserved Policy OID, inverting the current CSBR v3.10.0 rule.

31-03-26

Dutch Public Holidays in April 2026

Due to public holidays, LeaderTelecom BV will be closed on April 3 (Good Friday), April 6 (Easter Monday), and April 27 (King's Day).

06-03-26

LeaderSSL® Trademark Renewed in the European Union

We are happy to announce that the LeaderSSL® trademark has been officially renewed with the European Union Intellectual Property Office (EUIPO).

03-03-26

DigiCert Extends ClientAuth EKU Sunset Date to March 2027

DigiCert has announced an extended timeline for removing the Client Authentication (clientAuth) Extended Key Usage (EKU) from its public SSL/TLS certificates. The new deadline is March 1, 2027.