< Back to latest news & events

Knowledge Hub

End of EPO “10 day rule” from 1 November 2023 – 4 weeks to go

October 2023

Any communications sent from the EPO on or after 1 November 2023 will no longer have the “ten day rule” applied to them.   This means that communications are deemed to be delivered on the date printed on the correspondence, and any calculations of deadlines the recipient is required to reply by, are made from this date.

What action do I need to take?
There is no specific action that needs to be taken regarding this rule change – but you need to be aware that the additional 10 days to respond to EPO deadlines can no longer routinely be relied upon for communications sent from the EPO on or after 1 November 2023.

What is the ten day rule?
The 10 day rule was introduced by the EPO to factor in postal delivery delays when physical letters were the normal method of communication. Any deadlines in the letters were calculated from the date printed on the letter plus 10 days. This acted as a cushion for the letter to be sent and then delivered to the recipient.  Up to 31 October 2023, for example, if a Notice of Intention to Grant letter was received from the EPO, setting a 4 month deadline to reply to, then the actual deadline to respond would be the date printed on the letter + 10 days + 4 months.  From 1 November 2023, this will no longer be the case.

Why is the ten day rule being abolished?
In 2011 the EPO introduced the EPO electronic Mailbox which has grown in use. Now, 99% of EPO correspondence is sent electronically and postal service delays associated with physical letters are insignificant.  Therefore from 1 November 2023, the date printed on an electronic communication is the date it is assumed to be received, and any deadlines for responding to the communication are calculated from this date. For example if the EPO sent a Notice of Intention to Grant on or after the 1 November 2023, then the deadline to reply by would be the date printed on the communication + 4 months.

What safeguards are in place instead of the 10 day rule?
If the recipient alleges a communication was never received, the EPO must prove otherwise. If the EPO is unable to do this then it must send a new communication with a new date, which resets any deadlines using the date of the new communication.
If the recipient alleges that the communication was received after the date printed on the communication then one of two scenarios could unfold:

  1. If the communication was delivered within 7 days of the date printed on the communication, no adjustment is made and the period for responding is calculated from the date printed on the communication.
  2. If the document was delivered 7 or more days after the date printed on the documents then it is considered exceptionally late and any deadlines are extended by the number of days difference between the date of the delivery and the date on the document, minus 7 days.

 

If you would like further information or advice on this change, please click here or contact your usual HGF representative.

Latest updates

Event - 23rd - 25th March 2026

HGF are Gold Sponsors of IPBC Europe 2026

HGF are proud sponsors of IPBC Europe 2026, taking place from 23-25 March 2026 at the Pullman Paris Montparnasse. Bringing together patent pioneers, in-house leaders and private practice specialists, IPBC …

Event details
Event - 8th - 11th February 2026

AUTM Meeting 2026

We are attending the AUTM Annual Meeting from 8–11 February, a flagship event bringing together technology transfer professionals from across the globe. AUTM connects innovators, universities, and industry leaders to …

Event details
Event - 3rd February 2026

HGF Brand & Design Conference 2026

Join us on 3rd February 2026 for HGF’s Brand & Design Conference, the must attend event for in-house legal teams, brand leaders, creatives, and innovators shaping the future of IP. …

Event details
Event - 14th January 2026

Seminar on The aftermath of G1/24 - has anything changed?

HGF is hosting a The aftermath of G1/24 – has anything changed? Which will be followed by networking, apero, and snacks. The Seminar will be held on Wednesday, 14th January …

Event details
Event - 24th - 25th November 2025

HGF Partners with 3AF for the P2I2025 Symposium

HGF are pleased to be a partner of P2I2025, the annual symposium organised by the Intellectual Property Commission of the French Aeronautics and Astronautics Association (3AF). The event brings together …

Event details
Event - 18th November 2025

OIS Investor Forum - Jeffries

HGF is proud to be sponsoring the OIS Investor Forum on 18th November. One of the premier gatherings for leaders, innovators, and investors across the healthcare industry. The forum covers …

Event details
Event - 4th November 2025

HGF are Silver Sponsors of LSPN Europe 2025

HGF is proud to be a Silver Sponsor of LSPN Europe 2025, a leading forum dedicated to helping life sciences innovators protect and leverage their intellectual property across the entire …

Event details
Event - 30th - 31st October 2025

RAPS European Digital Technologies and Software conference

HGF is proud to be attending the RAPS European Digital Technologies and Software conference in The Netherlands on 30th-31st October. HGF Partner and Patent Attorney Janine Swarbrick and Patent Director …

Event details