Mac.

Pool Number A Pool Number is a unique numeric or alphanumeric designation used to identify a Pool. Pool Supplement A Pool Supplement is a disclosure document that supplements the UMBS/MBS Offering Circular or the ARM PC Offering Circular and contains information about the Mortgages in a Pool as of Settlement Date. Prefix A Prefix is a two-character numeric or alphanumeric designation that Freddie Mac uses to indicate terms and underlying Mortgage types of a Pool. The Prefix is presented separately from the Pool Number of the related Pool.