Here's an excellent way to avoid bad property managers.
The best place to go to search for a great property manager is the National Association of Residential Property Managers website - www.NARPM.org
You can search for members in the local area where your rental property is located.
Look for members with designations like Residential Management Professional (RMP) or Master Property Manager (MPM). These are property managers that are way above the rest, and the ones that can be trusted to provide quality service and care for your investment property.
Also another designation to look for if you can find it is a company that has there CRMC designation. There are only about 60 management companies that are Certified Residential Management Companies. (CRMC).
These are companies that have been audited by the National Association of Residential Property Managers and have demonstrated a high standard of both procedures and customer service.
Again, the best way to find a good property manager is to seek a property manager out and has invested in advanced training and education and has attained designations; usually, they also have years of experience and a proven track record.