Do some documents require a handwritten signature and, if so, which?

In Online Filing, documents attached to an electronic filing form do not require a handwritten signature. Electronic filing forms (e.g. Forms 1001E2K, 1200E2K, 1038E, PCT/RO/101, PCT-SFD or PCT-DEMAND) can be signed using a facsimile signature, an enhanced electronic signature or a text string signature. A facsimile signature is an image reproduction of the filing person's signature. An enhanced electronic signature is an electronic signature issued or accepted by the EPO and confirmed with certificates issued or accepted by the EPO (i.e. signing using a smart card). A text string signature is a string of characters, preceded and followed by a forward slash (/), selected by the signatory to prove their identity and their intent to sign.