Intkal (also called Mutation) is the process of updating property ownership in the revenue records maintained by the Patwari (local revenue official). After a property is registered (sale deed signed), the buyer must apply for Intkal to update the ownership in government records. Without Intkal, the property officially still shows the old owner in revenue records even after registry. "Mutation Done" in a listing description means the ownership transfer is complete in all government records — a very positive signal.