Can friend or relative submit DU transcript request?

Can friend or relative submit DU transcript request?

Can anyone go and submit the documents signed by the requestor or do we need authorization even for submission of documents?
I know that we need authorization for collection. My question is for submission.

Secondly, authorization can be given just by writing on a piece of paper and signed by the requestor, or there is a format to do so?

Anybody can submit the request in-person in Delhi University campus

There is no specific format for authorization letter. Simple words are sufficient to give authority to collect documents on your behalf.
It’s good to carry a copy of requestor’s ID proof.