Does the borrower still qualify for any relocation assistance (Cash for Keys) if he or she agrees to the D4L?
No. Cash for Keys is intended to cover relocation assistance, and a D4L borrower is not relocating. From: https://www.efanniemae.com/sf/servicing/d4l/pdf/d4lfaqs.pdf Fannie Mae’s rental policy allows renters in Fannie Mae-owned, single-family foreclosed properties the opportunity to stay in their homes by signing a new month-to-month lease with Fannie Mae.