Intellectual Property Code
Section 62. Requirement of the Petition. - The petition for cancellation shall be in writing, verified by the petitioner or by any person in his behalf who knows the facts, specify the grounds upon which it is based, include a statement of the facts to be relied upon, and filed with the Office. Copies of printed publications or of patents of other countries, and other supporting documents mentioned in the petition shall be attached thereto, together with the translation thereof in English, if not in the English language. (Sec. 30, R.A. No. 165)