12 C.F.R. § 161.55
(a) The term with recourse means, in connection with the sale of a loan or a participation interest in a loan, an agreement or arrangement under which the purchaser is to be entitled to receive from the seller a sum of money or thing of value, whether tangible or intangible (including any substitution), upon default in payment of any loan involved or any part thereof or to withhold or to have withheld from the seller a sum of money or anything of value by way of security against default. The recourse liability resulting from a sale with recourse shall be the total book value of any loan sold with recourse less:
(b) The term with recourse does not include loans or interests therein where the agreement of sale provides for the savings association directly or indirectly:
[76 FR 49043, Aug. 9, 2011, as amended at 79 FR 11313, Feb. 28, 2014; 84 FR 56376, Oct. 22, 2019]