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Notice of opposition must be filed within the opposition period in a written reasoned statement. That means that the opponent must state at least one ground for opposition under Article 100 and indicate the facts, evidence and arguments presented in support of the ground(s). Otherwise the notice of opposition will be rejected as inadmissible. It is advisable to use the EPO opposition form, which provides all the information needed to ensure that an opposition is admissible. This form is available free of charge from the EPO and the central industrial property offices of the contracting states and can also be downloaded from the EPO website (www.european-patent-office.org).

180

Notice of opposition may also be filed by telegram, telex or fax (see points 123-128).