Do you accept IOU`s with your clients?

Never before have we actually been approached by a prospective tenant asking us if the "Landlord will accept an IOU" in lieu of paying the rent.
It takes a lot for a person to assume someone would.Yet as I awaited the "punch line" from this person, I could tell they were quite serious.
We do a lot of rentals throughout Florida. Basically, the rules are simple. The landlords require "1st,last and security" when accepting a new tenant.
The call came in yesterday afternoon while I was training our newest agent. They wanted to view our listing in Hollywood,Florida. Without hesitation we told the prospective tenant we`d be there in 20 minutes for them to view the home. I wanted our agent to "Get a Feel" for the way we do business.
We showed the home to this person, they indicated they wanted it and we directed this person back to our office to write the lease and run a credit check. We explained the procedure to this person,they seemed to understand until we got down to business.
The conversation is as follows:
Me: We need you to fill out a "Reference Sheet" so we may proceed.
Mr. IOU: Great! Do you think the landlord will allow me to move in next Thursday?
Me: Sure, it`s not a problem, we need to write the lease, send a copy to the landlord and collect a check for the 1st months rent.
Mr. IOU: Well, there is a slight problem. I`m kinda short for the rent!
Me: Do you have at least 1 month`s rent?
Mr. IOU: Actually, I don`t have any right now, but I`m good for it! I just relocated from Wisconsin.
Me: So, you`re asking the landlord to rent you a home with an IOU?
Mr. IOU: Yes, i`m going have the money in 30 days.
With that we immediately tell Mr. IOU this isn`t how we do business. He appeared to understand and asked if I can make the call to the landlord anyway and explain his circumstance.

I don`t know about you, but dealing with IOU`s isn`t our thing!
How would you have dealt with this situation?