If you are the sole beneficiary of a deceased father's will concerning self-acquired property, the will itself serves as the document of title. Upon your father's death, the property automatically devolves to you by operation of law. While mutation in revenue or municipal records is a formality for updating records, it does not create or divest title. You can apply for mutation with the relevant local authority (RDO/SDO for agricultural land, or Municipal Corporation/Panchayat for property) using the will and death certificate. Probate is generally not required unless there are objections, though consulting a local lawyer is advisable for professional guidance.