Useful evidence includes the signed tenancy agreement, check-in and check-out inventories, dated photographs or videos, meter readings, and messages about the property's condition or proposed deductions. Keep receipts, invoices or estimates supporting cleaning, repairs or replacement costs, and evidence of rent or bills paid. Explain which deductions you dispute and provide a clear timeline, rather than relying only on statements about what happened. The RTB will assess the evidence and the individual tenancy facts through its dispute resolution process; consider taking advice from a solicitor if the amount or circumstances are significant.