For people who have joined SBI PO / IBPS PO / RRB PO & Clerk

Just a quick question; while filling the indemnity bond, do we need to show any income proof of our surety?

Is just the signature of the surety on stamp paper and their Aadhar photocopy enough? Does SBI or any IBPS bank or RRB bank ask for income proof like ITR?

If they do ask, is pension slip accepted?