At the request of all parties. According to Peru's trademark registration guide, a copy of the signed trademark proxy power of attorney must be submitted within 60 days from the date of application (notarization is not required), and whether notarization is required is free for the parties to choose. Notarization is an activity in which a notarization institution proves the authenticity and legality of civil legal acts, facts and documents with legal significance according to the application of natural persons, legal persons or other organizations and legal procedures.