Sir the property can be attached since information was not disclosed to you can file a case of cheating breach of trust on the lady, further can join as party in the execution petition and plead before court that since you are bone fide purchaser the information was not disclosed neither the property documents showed the record. so in that circumstances since the third party rights are created the property can be left and other can be attached,
If court attaches and auctions the property even after your application then in that case you can file a suit for recovery of your amount.
Yes inform the bank about the legal notice.