The employee is requesting copies of the information the organization used as backup to terminate the employee, the document was used as a guideline for the owners of the business and the document was not signed by the terminated employee...do we have to supply a copy of this document?

There is no statutory obligation on you to provide the document. However, if you have terminated the employee for cause, you may eventually need to produce the document anyway to prove that you had grounds to do so. I highly recommend speaking with an employment lawyer at the number below.