If you would like to authorize someone to collect your transcripts, here is a sample authorization letter for transcript of records and diploma.
[Name of Educational Institute]
Subject: Authorization for Transcript of Records and Diploma
I, [Your Name], graduated with a degree in [Degree specifics] in [Year of Graduation]. It would help if you could send my Diploma and a record of my transcript at the earliest.
I authorize [Name of Entrusted Person] to collect the copies on my behalf.
Thank you for your aid and thoughtfulness in this matter.