Useful evidence includes the tenancy agreement, deposit and rent-payment records, check-in and check-out photos, an inventory, and dated messages about the property's condition or proposed deductions. If damage or cleaning is disputed, keep invoices, receipts, repair quotes and photographs, while landlords should distinguish damage from fair wear and tear. Records showing attempts to resolve the issue, such as requests for the deposit or explanations of deductions, can also help. The RTB will assess the evidence and the individual tenancy facts through its dispute-resolution process, so consider legal advice if the amount or issues are substantial.