1) As per Supreme Court Rules, when a document is filed in Supreme Court, someone has to file affidavit that the Document is True copy of its original. Unless there is such affidavit, Supreme Court cannot direct respondent to admit or deny this document.
2) Suppose if document is found fudged or forged, then it will be contempt of court. Supreme Court must have name and address of person who may have misguided court with false document. Then only it can take contempt proceeding.
3) Disclosing name could be risky for whistle blower. So judges asked that name be given to Registrar General of Supreme Court.
This is my personal opinion.
Haresh Raichura
16/9/14