Home » UPC decisions » Luxembourg Court of Appeal » CoA, May 22, 2026, judgement by default, UPC_CoA_21/2026

CoA, May 22, 2026, judgement by default, UPC_CoA_21/2026

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Key takeaways

A decision by default against the defendant of the claim or counterclaim may only be given where the facts put forward by the claimant justify the remedy sought and the procedural conduct of the defendant does not preclude giving such decision. R. 355.2 RoP thus only applies when a decision by default is sought “against the defendant of the claim or counterclaim”. It does not apply when a decision by default is requested by the defendant against the claimant because the claimant failed to take a step within the time limit foreseen in the RoP or set by the Court or it failed to appear at an oral hearing pursuant to R. 355.1(a) and (b) RoP (CoA, 12 July 2025, UPC_CoA_363/2025, Microsoft v Suinno I, para. 17).

This follows from the fact that it is the appellant who is seeking the “order” or “remedy” referred to in R. 355.2 RoP, namely by requesting that the Court of Appeal set aside the impugned order or decision. This is particularly pertinent in cases where the defendant is the appellant and has not provided security for costs. If the respondent on appeal who was the claimant before the Court of First Instance (CFI) were required to present facts in support of the judgment being upheld, the purpose of providing security for costs in the appeal proceedings would largely be defeated. Even though the appellant has not provided security for costs, the respondent would still be required to file a Statement of response, incurring additional costs. As established in the order for the provision of security by the appellant, there is a risk that these costs will not be reimbursed. It is precisely from this risk that the respondent is to be protected.

Division

Court of Appeal of the Unified Patent Court

UPC number

UPC_CoA_21/2026

Type of proceedings

Decision by default against the appellant (R. 355, 357 RoP)

Consequences of the failure to provide security for costs (R. 158.5 RoP

Parties

Appellant (Defendant in the Counterclaim for revocation proceedings): Suinno Mobile & AI Technologies Licensing Oy

Respondent (Claimant in the Counterclaim for revocation proceedings): Microsoft Corporation

Patent(s)

EP 2 671 173

Jurisdictions

UPC

Body of legislation / Rules

R. 355 RoP, R. 357 RoP; R. 158 RoP


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  • Saskia Mertsching, Attorney-at-Law (Rechtsanwältin) BARDEHLE PAGENBERG Partnerschaft mbB

    Attorney-at-Law (Rechtsanwältin), UPC Representative, Senior Associate

  • Dr. Niels Gierse, German and European Patent Attorney, UPC Representative, Senior Associate at BARDEHLE PAGENBERG

    German and European Patent Attorney, UPC Representative, Senior Associate

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