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. Regarding signature of documents filed electronically in appeal proceedings, the authenticity of the documents must be confirmed by an enhanced electronic signature.