The Claims Manual
The Latest addition of the Claims Manual is effective 10/2021, a link to the manual is listed below.
Purpose The purpose of the NFIP Claims Manual is to improve clarity of claims guidance to WYOs, vendors, adjusters, and examiners so that policyholders experience consistent and reliable service. The manual provides processes for handling claims from the notice of loss to final payment. All NFIP bulletins, other than those announcing Flood Insurance Claims Office numbers, Flood Response Office locations, claims adjuster briefings, and current and future program changes, are superseded by this manual and of no further effect.
Source: The above is from the Claims Manual
A link to a pdf that contains the changes to the claims manual in the Oct 1, 2021 edition is listed below in the link section.
NFIP Claims Manual Table of Changes Updates to the October 1, 2021 NFIP Claims Manual These tables note specific and substantive changes, additions, and deletions in the 2021 NFIP Claims Manual, as compared to the May 2020 version. Section 1 compares the October 2015 SFIPs shown in the May 2020 NFIP Claims Manual to the October 2021 SFIPs shown in this Manual. FEMA made corrections throughout the entire document to sentence structure, capitalization, acronyms, formatting (font, paragraphs, spacing, bullets, numbering, etc.), plain language, word choice, grammar, punctuation, and repetitiveness. We will continue to refine this product at each update.
Source: The above is the NFIP Claims Manual Table of Changes
Please note that there is the NFIP Claims Manual and a NFIP Insurance Manual. The Insurance Manual is available on the same page as the Claims Manual but "is used primarily by insurers and agents selling and servicing NFIP flood insurance."