When purchasing a property with boundary discrepancies found on previous sale deeds, a rectification deed may be necessary. The key question is whether to rectify only the most recent sale deed or all prior ones containing the error. While some advise rectifying the previous deed, others suggest focusing on the latest deed while referencing the chain of title. It's crucial to consult local property lawyers and the sub-registrar's office, as rectification processes and limitations vary by state, and errors could impact future bank loans and legal checks.