Indemnity bond from buyer

Hi, Im buying a residential property on homeloan from registered GPA holder, I'm getting registered sale deed done for the same on my name but Bank is asking me to sign on a Indemnity bond that in case there is any dispute on the property then bank will catch the purchaser i.e. me and will not hold the seller from whom I'm buying this property. I want to know how can I make sure that if anything happen in future and bank catches me so I should be able to catch the seller to give me my money back.