If you have control of the property it makes thing alot easier, check out a mortgage broker they can usually find something. The credit bureaus will sell that public record information, but it will not be accurate. Imagine that GMAC Mortgage makes a loan to someone. The record will show the owner as GMAC Mortgage. However they will then participate the note out to others.

The contract may or may not be recorded in the public record. Further, if it is held for a trust indenture, none of the actual holders will ever be known except in the case of a bankruptcy of the indenture trustee.

Finally, for private issuers, your ability to assess the quality of the note will be negligable.