A buyer purchased a property after the seller claimed the original documents were lost and a FIR was filed. The encumbrance certificate showed no mortgage. However, a financer later claimed the property was mortgaged and issued a possession notice under the SARFAESI Act. Experts advise immediately filing a petition with the Debt Recovery Tribunal (DRT) under Section 17(1) of the SARFAESI Act, including an interim petition for a stay on recovery proceedings, to challenge the claim and protect the buyer's title.