Is a system-generated Sale Confirmation Letter valid under SARFAESI Ac

I received the Sale Confirmation Letter via email from the MSTC e-Bkray auction portal, which states, "This mail is from the Authorized Officer and is generated through the computer system, hence no signature is required." The borrower obtained a stay order from the DRT the day after the e-auction. I have not received a physical Sale Confirmation Letter from the bank, and the borrower has complied with the conditions of the stay order. I have already been impleaded in the SA. In this context, could you please clarify the following: 1) Is a signed Sale Confirmation Letter mandated under the SARFAESI Act to confirm the sale? 2) Is the system-generated Sale Confirmation Letter from the MSTC e-Bkray portal equally valid as the physical Sale Confirmation Letter issued by the Authorized Officer? 3) How can I submit this information in the SA without filing a new interlocutory application? Thank you.