With the exception of annexes, any documents filed after filing of the European patent application must be signed. In online filings the signature may be in the form of a facsimile, text string or enhanced electronic signature. In paper filings it may be a handwritten signature or a reproduction of the filer's signature (on faxes). The name and position of that person must be clear from the signature. Following the revised decision of the President of the EPO which entered into force on 16 November 2015, the use of an enhanced electronic signature is no longer mandatory in appeal proceedings. Article 8(2) of the decision dated February 2009 on the electronic filing of documents (OJ 2009, 182) has been deleted in the revised version.
The signature on documents filed using the EPO new online filing (CMS) or the web-form filing service may take the form of a facsimile signature or a text string signature. 
If the signature is omitted from a document, the EPO will invite the party concerned to sign within a fixed time limit. If signed in due time, the document retains its original date of receipt; otherwise it is deemed not to have been received. 

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