ECJ ruling brings clarity on the interruption of forfeiture periods

Managing IP is part of Legal Benchmarking Limited, 1-2 Paris Gardens, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement

ECJ ruling brings clarity on the interruption of forfeiture periods

Sponsored by

maiwald-logo-cropped.PNG
dominoes-1902622.jpg

Susanna Heurung of Maiwald examines a decision by the European Court of Justice concerning the ending of a period of ‘acquiescence’ in a trademark case and what it means for potential plaintiffs

In a recent judgment, the European Court of Justice (ECJ) has clarified under which conditions a cease and desist letter can interrupt forfeiture periods (ECJ GRUR 2022, 986 – HEITEC). According to the ECJ, this should only be the case for actions and warning letters that are aimed at achieving a legally binding solution and have been implemented with due diligence.

Facts of the case

This judgment concerned a legal dispute between HEITEC AG as plaintiff and HEITECH Promotion GmbH as defendant, whereby HEITEC AG, as the owner of the earlier trademark, demanded that HEITECH Promotion GmbH cease and desist from using the company mark HEITECH Promotion GmbH and from using trademarks with the word element "heitech".

Following an unsuccessful warning letter, HEITEC AG took three and a half years to file a lawsuit, which was not served on the defendant until one and a half years after the action had been filed due to various formal errors. The proceedings went all the way to the Federal Court of Justice (BGH), which had to clarify whether HEITEC AG should be held liable for forfeiture under Section 21 I, II MarkenG, since it had tolerated the younger trademark for five years despite being aware of it.

The decisive question was therefore which requirements are to be met by measures that can interrupt such acquiescence and therefore forfeiture of rights. This question was referred to the ECJ.

Decision of the ECJ

In its ruling, the ECJ clarified that only actions in which the serious intention to terminate the infringement is clearly evident can terminate the so-called acquiescence. This is generally the case when an administrative or judicial appeal is filed. However, seriousness is also lacking here in exceptional cases if the filing of such a legal remedy is defective and these defects are not corrected in a timely manner.

Also, a warning letter can terminate the acquiescence. However, if the cease and desist letter remains unsuccessful, there is also a lack of sufficient seriousness here if further possible measures to remedy the infringement are not taken promptly.

When to file a lawsuit

In future, only those measures that are taken promptly (and in proper form) will be able to end an acquiescence if there is no doubt as to their seriousness. If a warning letter remains unsuccessful, further actions must follow in a timely manner, whereby the ECJ specifically only comments on the fact that in any case the filing of an official or judicial legal remedy is sufficient.

It is therefore advisable to file a lawsuit immediately after the unsuccessful expiry of a deadline set in the warning letter in order to signal seriousness and to prevent forfeiture. Repeatedly sending warning letters without taking further steps when the deadlines set in the warning letters expire does not help. In turn, filing a lawsuit must be suitable to end the acquiescence.

Thus, the plaintiff should do everything possible to ensure prompt service on the defendant. The mere filing of an action as a sham for delaying the deadline, without observing the formal requirements or without prompt correction of errors, will no longer be able to bring about an end to acquiescence according to this judgment.

more from across site and SHARED ros bottom lb

More from across our site

Yossi Sivan explains how Israeli judgment is a pro-brand owner departure from the norm and why it sends a strong message that corporate structures are not always a shield
Halim Shehadeh, group CEO of IP firm CWB, says that in the rush to discuss what AI can do, IP firms are overlooking the more important question of whether they are ready
Caitlin Heard, who formally joined the firm from CMS last month, says she is excited by the ‘energy’ of the London office
Ranjna Mehta-Dutt, who moved to Chadha & Chadha after 25 years at Remfry & Sagar, says the firm plans to expand its life sciences practice through targeted recruitment and dedicated teams for bigger clients
The initial contempt of court claim targeted Stobbs and the firm’s client for allegedly interfering with the administration of justice
Acquisition of platform developed by Boehmert & Boehmert lawyer set to create a combined platform for patent drafting and prosecution in Europe
Partner Rob Jacob unveils plans to offer a beginning-to-end trademark service, how to make prosecution profitable, and why IP ‘buy-in’ from the CEO stands the firm in good stead
Attorneys at Di Blasi, Parente & Associados share how the protection of trade secrets strengthens innovation by bringing together legal practice, regulatory developments, and established international references
Jin Ooi, who joins as a partner today, said he is excited to offer a ‘rounded’ IP service as the firm deepens its litigation expertise in the UK and Europe
As generics celebrate, practitioners believe innovator companies should brace for an ‘uphill battle’ when trying to prove induced infringement
Gift this article