A Mumbai resident is struggling to sell their flat purchased in 2001 because the sale agreement was never registered, and the seller has since passed away. Banks are refusing a loan to the new buyer without the registered agreement. While one lawyer suggested registration wasn't compulsory then, others clarified it is mandatory. The advised solution was to approach the seller's legal heirs to execute a registered sale deed, or potentially file a suit for specific performance. Ultimately, the original owner successfully resolved the issue by getting the documents regularised through adjudication at the registrar's office, which satisfied the bank.