Is this property for the client's personal use, or is it intended as an investment? Does this client own other real property in the destination country?All you have to do is fill out our easy-to-understand questionnaire. NSBAR Referral Network Agreement. This form is for licensed Illinois real estate brokers to refer clients to Fannie Mae Last Look Auctions. Learn how real estate referral fees work, the typical referral commission fee structure, and how to write a referral agreement. Referral fee agreements are good for lawyers and clients. Fully complete all the fields in the Agreement as follows: a. On page 1, in the Agreement title, enter the legal name of your agency. b. This is a quick tutorial on how to write a referral agreement.