Dear Sir,
My answers are as follows:
1. how can i safeguard my 50% of undivided share in this circumstances from sarfasi act or Bank ?
Ans: If the case is pending before any authority like Debt Recovery Tribunal (DRT) or any other authority then approach them and pray for necessary relief.
2. Bank already filled caveat against builder on 11 Jan 2019 , can we also file caveat against bank though we are neither a borrower nor a lender but serially affected by sarfaesi act ?
Ans: Yes, you can file another Caveat.
3. Is it possible to stay SARFASI proceedings if Bank go ahead without safeguard my 50% undivided share ?
Ans: The proceedings under SARFASI Act are summary in nature but it depends upon facts of each case and convincing capacity of your high profiled advocate.
4. Is it possible to force bank to auction primary property first & if the bank dues are not recovered after primary auction then only bank can proceed for secondary collateral ?
Ans: It is left to the Bank discretion and you cannot direct the Bankers however you may impress upon the Tribunal to issue such directions to the Banker.