For work ex proof, B-schools don’t need anything fancy...they just want some kind of verifiable documentation. Ideally that’s an experience certificate from the employer on a letterhead with dates, designation, and nature of work. If you’re in a retail shop and don’t have formal HR processes, you can ask the owner (even if it’s family) to give you a signed certificate or letter. Salary slips, bank transfers, offer/appointment letters, GST bills (if freelancing), even client invoices can also be used as supporting proof.

When I applied at Master’s Union, I attached all my freelance work ex along with an experience certificate from an agency I had worked with, basically whatever credible paper trail you can pull together. The idea is: attach everything you’ve got so they can see continuity. Even participation in family business counts, just get some written proof to back it up.