On April 8, 2026, Fannie Mae issued Lender Letter LL-2026-04, establishing a governance framework for seller/servicer use of artificial intelligence and machine learning. The letter is effective 120 days from publication—approximately August 6, 2026.
That sentence should get your attention. Because as of today, both Government-Sponsored Enterprises have issued AI governance mandates for every seller/servicer. Freddie Mac’s requirements under Bulletin 2025-16 (§§1302.2 and 1302.8) have been in effect since March 3, 2026. Fannie Mae’s requirements take effect in August. If your institution sells or services
loans for either GSE—which is most of the market—the compliance window is closing.
