Is there any document I can get to resolve the issue of missing last name on my documents for passport application?

Yes, you can resolve a missing last name on your documents for your passport application by updating your passport to include your surname.

To do this, you will need:
- Affidavit for change of name: A notarized legal document stating your full name, including your surname.
- Newspaper publication: Publish your name change in two newspapers (one local, one in your hometown) at least 30 days before applying for the update.
- Supporting documents: Gather educational certificates, government IDs, and any official documents that show your full name.

Once you have these, apply for a passport update at your nearest Passport Seva Kendra or Indian consulate. This process should help resolve issues related to a missing last name on your documents.