How does a landlord prevent themselves from wrongfully retaining a security deposit?

In order to for a tenant to prove that a landlord wrongfully detained a deposit, the tenant must prove that the security deposit was retained in "bad faith", meaning the intent to deprive the tenant of the refund lawfully due. You, the landlord, will be presumed to have acted in bad faith if you fail to provide the security deposit or itemized list within 30 days of the tenants provision of a forwarding address.