Initials or other abbreviated forms will not be accepted as a signature.
Where the notice of opposition is filed in electronic form, the signature may take the form of a facsimile signature, a text string signature or an enhanced electronic signature (see OJ EPO 2009, 182).
Where the notice of opposition is filed by fax, the reproduction on the facsimile of the signature of the person filing the notice of opposition will be considered sufficient.
If the signature is omitted, the formalities officer must request the party, or where appropriate his representative, to affix his signature within a time limit to be laid down by the formalities officer. If signed in due time, the document retains its original date of receipt; otherwise it is deemed not to have been received (see D-IV, 1.2.1(ii) and D-IV, 1.4.1).