Written or graphic instruments issued prior to the execution of the agreement, which modify or interpret the contract documents, drawings and specifications, by addition, deletions, clarifications or corrections.
Supplement to the proposal form as originally issued, covering additions, corrections, or changes in the bidding conditions for the advertised work. Addenda are issued to prospective bidders prior to the date set for opening of proposals. (A list of addenda issued for projects in upcoming lettings is posted. This does not include the Addenda itself but merely lists what projects have had addenda issued.)
Clauses, documents, or statements added to a contract that alter it in some way. To be enforceable, an addendum must be signed or initialed by both buyer and seller and clearly referenced in the body of the contract. For example, a contract might refer to an addendum by saying that" An addendum is attached to and made a part of this contract."