Clearly state the purpose of the authorization. Mention what actions the authorized person is allowed to take on your behalf.Can't collect your passport in person? Learn how to draft a letter of authorization, allowing someone else to pick it up for you. Signature: Sign the letter with your full name. In some cases, it may need to be notarized for legal validity. Authority letters to collect passports are necessary if you're unable to collect your new travel document in person. In case you're sending someone to pick up documents on your behalf. Specify the nature of the case, the lawyer's role, and any relevant case numbers or documents.