12 CFR § 792.12
How will I know what records NCUA has determined to be exempt?
November 10, 2020
As long as it is technically feasible and does not threaten an interest protected by the FOIA, we will:
(a) Mark the place where we redacted information from documents released to you and note the exemption that protects the information from public disclosure; or
(b) Make reasonable efforts to include with our response to you an estimate of the volume of information withheld.