In India, a rectification deed is used to correct factual errors in a registered property document, such as boundary descripttions. According to legal norms:
✅ All parties to the original sale deed or their legal heirs must typically agree and sign the rectification deed.
✅ If the original seller is deceased or unavailable, the legal heirs (like your mother and sons) may execute the deed.
✅ If the property is jointly inherited (as per your father's will), then all legal heirs—your mother and you three sons—are considered co-owners. So, if the rectification affects ownership or boundary details that impact all shareholders, your mother alone may not be sufficient to execute it. Ideally, all co-owners should be part of the rectification deed to avoid future disputes or legal challenges2. You can explore more about the process and requirements on NoBroker’s guide to rectification deeds or Housing.com’s legal overview.