What is the difference between ZertES and eIDAS for Swiss businesses?

ZertES (SR 943.03) is the Swiss Federal Act on Electronic Signatures, governing electronic signatures and related trust services within Switzerland. eIDAS (EU Regulation No. 910/2014) is the EU's equivalent framework, applicable across all 27 EU member states. For Swiss businesses, ZertES governs transactions with Swiss counterparties, Swiss courts, and Swiss public authorities. If your contracts, documents, or IP evidence will be presented in EU member state courts or to EU entities, eIDAS-compliant qualified trust services are required. Swiss Trust Layer issues timestamps that comply with both ZertES and eIDAS-equivalent standards, making them valid in both Switzerland and the EU.

Does Switzerland have a bilateral agreement with the EU on electronic signatures?

Switzerland is not an EU member and is not directly subject to the eIDAS Regulation. However, Switzerland has aligned ZertES with eIDAS standards to ensure broad mutual recognition in practice. Swiss-issued qualified electronic signatures and timestamps issued by providers accredited under ZertES are generally recognised in EU proceedings, particularly in countries with strong bilateral trade ties to Switzerland (Germany, Austria, France, Italy). For critical cross-border matters, Swiss Trust Layer recommends using a provider that holds accreditation under both ZertES and an EU QTSP framework to eliminate any recognition risk.

Can a Swiss company use ZertES timestamps to prove IP ownership in EU courts?

Yes, in practice. Swiss-issued qualified electronic timestamps from a provider meeting both ZertES SR 943.03 and eIDAS Art. 42 technical standards are accepted in EU court proceedings. The key requirement is that the timestamp be issued by a provider on an EU Trusted List or using technology meeting eIDAS Annex III standards. Swiss Trust Layer's qualified timestamp service meets these requirements, making timestamps suitable as IP creation date evidence in both Swiss cantonal courts and EU member state courts.

Which Swiss law applies to electronic signatures on business contracts?

Swiss business contracts are primarily governed by the Swiss Code of Obligations (OR/CO). For qualified electronic signatures, ZertES SR 943.03 and its implementing ordinances (VZertES/OCertES, SR 943.032) define the technical and procedural requirements. ZertES distinguishes between advanced electronic signatures (FES/SES) and qualified electronic signatures (QES/SEQ), and only the latter is legally equivalent to a handwritten signature for documents requiring written form under the OR. For documents that do not require written form, an advanced electronic signature or even a simple electronic confirmation may suffice.

What does a qualified electronic timestamp prove under Swiss law?

Under ZertES SR 943.03 and Article 14 of the implementing ordinance, a qualified electronic timestamp from a recognised Swiss certification service provider creates a legal presumption that the timestamped data existed in its exact, unaltered form at the date and time stated. This presumption is rebuttable. A party challenging it must prove the timestamp is inaccurate, but it significantly shifts the burden of proof in any Swiss court or regulatory proceeding. For IP protection, this means a qualified timestamp on your creative work, invention description, or business document establishes a court-admissible creation date without requiring additional evidence of authenticity.

Standards Compliance

ZertES 与 eIDAS 对比：2026 年瑞士企业必须了解的差异

Swiss Trust Layer Team · Compliance & Legal

2026年5月15日 9 分钟阅读最后更新 2026年8月21日

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In short

了解文件签署中 ZertES（瑞士）与 eIDAS（欧盟）的区别。哪一套标准适用于你，你的企业是否两者都需要？

2025年1月，一家总部位于苏黎世的SaaS公司与柏林一家企业客户签署了一份许可协议。合同是标准的PDF格式，注明日期，由双方签署执行。十四个月后，柏林客户对一项续约条款的范围提出异议，并质疑一份签署的补充协议究竟是在主协议之前还是之后产生的。苏黎世公司无法证明文件的时间顺序。德国法院要求提供合格的电子时间戳。但根本不存在。纠纷在和解前共花费苏黎世公司32万瑞士法郎的法律和仲裁费用。

如果您的企业在瑞士或整个欧盟运营，在任何关于具有法律约束力的数字签名的讨论中，您都会反复遇到两个名词：ZertES和eIDAS。两者都规定了数字签名何时具有与手写签名相同的法律效力。但它们适用于不同的司法管辖区，由不同的机构颁发，对法庭可采信性和跨境认可的影响也各不相同。

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