If additional terms are included in a contract, what are they referred to as?

In the context of contracts, when additional terms are included after the main agreement has been formed, they are referred to as "addenda." An addendum is a document that adds specific information or changes to an existing contract without altering the original agreement. This term is particularly important in legal and real estate contexts, where parties may need to clarify or expand upon the terms agreed upon initially.

Using addenda allows parties to modify the agreement's conditions while keeping the original terms intact, avoiding confusion or the need to rewrite the entire contract. This approach ensures clear communication of new conditions or alterations that all signatories must agree to, thereby helping to maintain the integrity and enforceability of the contract.

The other options, while they might describe changes or supplements in various contexts, do not specifically denote the addition of terms to a contract in the way that "addenda" does. Alterations suggest changes to existing terms rather than new additions, revisions imply a more comprehensive update of content, and appendices typically involve supplementary materials attached at the end of documents rather than integrated changes or terms within the agreement itself.