The bank officer has to be present

Otherwise who will admit the signature on behalf of bank?

1. Presence of bank officials who have taken the possession of property under SURFAESI act is necessary for registration of property auctioned under this act. 

2. No registrar will not register the property without presence of both parties of transaction.

The bank is the seller hence the bank has to be represented by its authorised officer to execute the registered sale deed in favor of the buyer.

The buyer cannot execute the registered sale deed in his favor  by himself.

Concerned officer from bank need to be present before sub registrar for same.

You may require bank authorised officer for the same. 

For registration of property registrar would insist on presence of representative from registrar office 

1. Though "Sale Certificate" under "Sarfaesi Act," is Final & Conclusive, the Recovery office (or authorized officer) MUST be present for registration of Sale Certificate, to prove that there is no further dispute or pending appeal proceedings against the property auction.

13 of SARFAESI and Rule 8 & 9 of Security Interest (Enforcement) Rules before conducting a valid sale. The bank will issue sale certificate in favour of the buyer and the defaulter have to confirm the same

NO, it will register on the basis of sale certificate issued by bank. Rest get it clarified from bank, who will represent the bank for registration of sale deed, in case required by Sub registrar.

Registration of sale certificate under SARFAESI act is not compulsory.

But you must pay stamp duty. If you pay the registration charges registrar will register it. No bank people need to be present in the registration office for it.