Owner financing question

[Mark Hoffman]

If I owner finance a particular property, and ask for 10% down, is there any law or compliance if a prospective buyer tells me they want to use outside lender financing? in other words, can I turn a buyer down (even a cash buyer) when they won't use me as their lender with seller financing. I am willing to make the interest rate very attractive to buyer and at no cost to them, no points.