Under non-SDS, candidates have to submit financial documents that will help justify their financial stability. The documents include Proof of Income (Income Tax Returns, Form-16, J-Forms). They can also add liquid assets in the form of GPF, Bank Statements, Fixed Deposits, and many more. A student or education loan taken from a bank is proof of funds too. So, even though it is not mandatory to submit proof of a student loan, it is mandatory to provide proof of financial stability.