Tenant did not pay deposit and now claiming they did

Hi,

I have recently applied for possession of my property and received a letter from the judge saying that i have a hearing date in 2 weeks.

It also says that the tenant claims to have paid a deposit of £950, whereas she did not pay any deposit at all. What can I do to prove this as I do not want to fork out £950 for nothing?

Thank you for your help in advance!