An Affidavit of Consent to Travel is required when a minor is traveling either with one parent (the other parent is required to give consent) or with another adult (both parents would be required to give consent) to an international destination. The requirements vary from country to country but generally, these are the requirements;
Names and addresses of both parents (or the adult traveling with the child)
Destination (where would they be traveling)
Dates when they would be traveling (if available)
Full details of the person they are traveling with.