Agency Identifier (AID) 3 Agency Identifier of account owner. Used in conjunction with the main account code, the AID represents the department or agency responsible for the TAS. Value required, never blank.
With regard to mortgage lending, the âpar rateâ is the interest rate a borrower will qualify for with a given bank or mortgage lender assuming there is no interest rate manipulation.
Par Value for Bonds. The par value of a bond is usually  $1,000, which is the face amount at which the issuing entity will redeem the bond certificate on the maturity date. The par value is also the amount upon which the entity calculates the interest that it owes to investors.