You have 60 days from the date FEMA transmits a determination or first appeal decision to file with the recipient. The recipient has 120 days from that same date to forward it to FEMA with its recommendation. Miss either deadline and FEMA denies the appeal as untimely.
Proof of the transmittal date, proof of when you filed with the recipient, and the recipient’s transmittal to FEMA.
Both deadlines run from FEMA’s transmittal date, not when you received or opened it. In FEMA’s second-appeal decisions, late forwarding by the recipient has repeatedly cost applicants their appeals, so track the recipient’s 120-day date too.