How to get Employment proof

A video recording showing it substantially should be fine, backed by photographs depicting her in a role wherein she is coming off as an employee in the store. However, you could probably move an application before the concerned Magistrate describing the same and requesting a direction to the Police to inquire from the Store owner and produce necessary documents. However, I suggest you to consult with your legal counsel or wait till an expert clarifies.

At the time of Enquiry in maintenance petition/Case.. Pay witness batta to concerned shop and ask them to provide the details regarding appointment, salary & etc... if you engaged a advocate, he will do the same if you didn't possess,such documents. 

The said store should be covered by the Shops & Estbs Act of the State.

The establishment has to comply with Shops & Estbs  Rules framed under Shops & Estbs Act of the State.

Various registers are to be submitted that include the name/DOJ/salary/wages, salary slip etc etc of the employee.

The employment might be covered under Min.Wages Act, Payment of Wages Act, PF,ESIC........

Such details might be with Inspectorate.It might be possible to get details. 

In case the employment is with some shady understanding the Inspector(s) appointed under the Act(s) can act and report.

The Inspector from Inspectorate can inquire and file report.