First, the point most people are not told: no law in India requires a woman to change her surname on marriage, or to revert to her maiden name on divorce. It is entirely a matter of choice, and keeping your existing name creates no legal difficulty whatsoever.
If you do want to change it
- Affidavit. Sworn before a notary or executive magistrate on stamp paper, stating your old name, your new name, and the reason for the change (marriage, divorce, or personal preference).
- Newspaper advertisement. Publish the change in two newspapers, usually one English and one in the regional language, and keep the original cuttings.
- Gazette notification. Apply for publication in the Official Gazette of the state, or the Gazette of India, with the affidavit, the newspaper cuttings, ID proof and photographs. The Gazette copy is the document most authorities want to see.
- Update your records, in a sensible order.
Do Aadhaar and PAN first, because most other authorities verify against them, then bank accounts, then passport, then employment, PF and insurance, then property and vehicle records, then educational certificates where the institution permits it. Doing the passport before Aadhaar is the commonest cause of a rejected application.
The supporting document differs by situation
- On marriage: the marriage certificate is usually enough for banks and the passport office, and many will change the name on that alone without a Gazette notification.
- On divorce: the decree of divorce. Reverting to a maiden name is generally treated as reverting to your original documented name, which is simpler than a fresh change.
- For a child's name: both parents ordinarily need to consent, and where custody is disputed, the court's permission may be required.
One caution
Keep every document in the chain: the affidavit, the cuttings, the Gazette copy. Years later, when a property title or a succession claim depends on showing that the person named in an old deed is you, that chain is the proof.