ODSP back rent payment — I have no proof, need advice

Hi everyone,

I recently got approved for ODSP in September 2025, but the back payment didn’t include my room rent for the months I was waiting for approval (April through September 2025). During that time, I was paying $600 per month in cash to my mum for my room, but I don’t have receipts, bank withdrawals, or any formal proof because I borrowed the cash from a friend.

My caseworker is asking for proof of rent payments, and I’m not sure what I can provide. The letter wasn’t sufficient.

Has anyone been in a similar situation? How did you handle it when ODSP asked for proof but you only paid in cash and had no receipts?

Thanks in advance for any advice!