As a mortgage guy, I must say a couple of things.  1) I sell the financing, you sell the property. 2) As a mortgage broker I know the TRUE financial situation, you don't. 3) I don't tell my clients to go to another realtor because they will only charge them 4 points to list their house instead of 6, nor should I, it is none on my business.

That being said, I know there are unscrupulous loan officers out there providing less than ideal financing, and you do have a fiduciary duty to your clients to protect them from "bad" loans, but unless you know the entire situation, how do you know it is a bad loan.  You can suggest to your clients to shop around, I am prepared for that since I am a professional.  I hate it when I am scraping the bottom of the barrel on a loan I have worked on fixing credit issues for a year and a realtor says to the client I know a guy that is here in my office maybe he would be easier to use him.  Then my phone calls stop getting returned and I am out a loan I worked very very hard to get. 

The thing I tell all the agents I work with is that I recieve a significant amount of leads in their area that have never had contact with an agent, and that I need referal partners in their area; I hope that we have a smooth easy transaction so I have someone I can count on to send my leads to.   

We all rely on referal partners and to steal a transaction from a potential lead source is stupid in my opinion. You never know how many potential clients may or may not be sent your way depending on your actions.

I don't mean to be harsh, but I think this must be said.

 Thanks to Tony Gallegos for pointing me towards a great blog with this very idea posted. I will provide the link so everyone can read the brilliance!

http://www.mortgageporter.com/reportingfromseattle/2007/04/when_are_you_ob.html