4.4.2Signature 

4.4.003With the exception of annexes, any documents filed after filing of the European patent application in grant, post-grant or appeal proceedings must be validly signed. In Online Filing the signature may be in the form of a facsimile signature, a text-string signature or an 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. 

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.