In Punjab, changing your surname after divorce involves a legal process. First, prepare an affidavit stating your intention to revert to your maiden name or choose a new surname. You must publish the name change in two local newspapers (one in English and one in the regional language) to inform the public. Optionally, you can apply for a Gazette notification for formal recognition. Once the legal process is complete, update your surname on personal documents like copyright, bank records, and Aadhaar card.