After reading about the prevalence of “professional tenants” online, we discovered that one of the ways in which landlords become ensnared by professional tenants is by inheriting them. That is, they purchase a rental property that already has a tenant. Unbeknownst to the purchaser, the tenant is a nightmare and that is why the property is being sold. It is absolutely critical that if a real estate investor is purchasing a rental property that is occupied, that he undertakes sufficient due diligence to be fully confident that the existing tenant is not a bad apple. This means that the seller will need to provide proof that the tenant has been paying on time, and in full, for the duration of his tenancy. The buyer would also need to have a background check run on the existing tenant, would need to verify his employment, etc. Some view purchasing a rental property with an existing tenant as a “bonus.” It is only a bonus if the tenant is not one the existing landlord is desperate to be rid of.