Common mistakes include missing the deadline to protect the deposit, using the wrong scheme, or failing to give the tenant the required information. In England and Wales, landlords generally have 30 days to protect a deposit and provide prescribed information; Scotland and Northern Ireland have different rules, so check the relevant official guidance. Tenants may also overlook checking that their deposit is registered or keeping evidence of the property’s condition. Keep the tenancy agreement, inventory, photographs and receipts, and seek advice from a housing solicitor or advice service if there is a dispute.