Best practices for handling tenant complaints include maintaining written records of all communications (even if you had a verbal conversation), documenting the steps taken to address the complaint, seeking input from anyone else that might be affected by the issue, and following up with tenants to ensure their satisfaction with the resolution. If it is a dispute between tenants, it is recommended you encourage them to resolve it amongst themselves. Becoming a mediator between two tenants can sometimes pose a problem for both owner and tenant.