@Ronald Lambert: What you are doing is completely acceptable... within the IRA... @Mark Nolan, there is nothing that states that an IRA cannot be invested in an Operating Business. It can be.
As you have not provided specifics of your structure, based on the information provided, I will guess that the IRA is a member of an LLC along with other investors. The LLC acquires the notes, and then goes through the loss mitigation process to acquire the property. Once acquired, rehabbed and sold or held for rental can cause the LLC to be viewed from a tax perspective as either an "operating company" or a "real estate operating company". While the "real estate operating company" definition is very clear, that the intent is for purchase (does not state how) and holding and managing real estate, then the IRA is automatically exempt from taxation (Unrelated Business Taxable Income - UBTI). If the LLC does not fall in that exemption, then the LLC will be deemed as an operating company and the IRA as member of the LLC will be subject to taxation (UBTI).
This is not a "check the box" option, it is subjective based on the work actually carried out and documented by the LLC.
Assuming another scenario, where the LLC simply buys and sells the notes, then as per the definition, the LLC actually gets deemed as an operating company, wherein the gains may be taxable to the IRA, but the interest received from the notes may not be taxable.
You have already mentioned that no disqualified party involved... so nothing to add here.
Hope this helps.