I would like to know if there is an accepted English noun or short phrase for the person who asks for a copy of an official document. In this case, I'm dealing with the translation of an academic transcript from Spanish, where this person is referred to as the *interesado*, i.e. the interested party. He or she is supposed to be one of the parents of the former student. Though “interested party” seems correct, maybe I'm missing some other, more specific word. I've seen “requester” suggested in a different question, but I don't think I've ever seen that word before. Synonyms for it found in thesauri, like “applicant” and “petitioner”, don't really fit the concept.