The author examines whether an award signed electronically can be deemed to constitute an award in writing as provided for in Article 31 of the UNCITRAL Model Law, which is reflected verbatim in article 1197 of the Polish Civil Code. The conclusion is that an electronic signature as such is functionally equivalent to the written signature. Having said that, not all types of electronic signature can be admitted in this respect. The eIDAS Regulation (Regulation 910/2014 of the European Parliament and of the Council on electronic identification and trust services) provides for three types of electronic signature: regular, advanced, and qualified, stating that the qualified signature should be deemed as equivalent to the written signature. The author is of the opinion that both the advanced and qualified electronic signatures fulfil the requirements of the form ‘in writing’, ensuring the safeguards as listed in article 26 of the Regulation. Specifically: it is uniquely linked to the signatory; it is capable of identifying the signatory; it is created using electronic signature creation data that the signatory can, with a high level of confidence, use under his sole control; and it is linked to the data signed therewith in such a way that any subsequent change in the data is detectable.