What is the term for a notation on a document that marks it for identification with another act?

The term that describes a notation on a document that indicates it is related or marks it for identification with another act is known as a "paraph." In Louisiana law, paraphing is a formal process where documents are physically connected to signify that they are part of the same transaction or agreement. This practice ensures that any future reference can easily link back to both documents, reflecting their interrelationship.

The paraph usually involves signing or initialing in the margin of both documents, often accompanied by a remark that clarifies their connection. It serves not just as an administrative tool but also as a means of legal assurance that helps in the interpretation and enforcement of related documents.

In this context, the other terms listed do not fulfill this specific legal function. Reference generally pertains to a mention or citation of another document rather than an actual notation. Endorsement typically refers to a signature or approval on a financial document or a contract and does not imply the act of linking two documents. Annotation refers to explanatory notes or comments added to a text, rather than connecting documents. Therefore, paraph is the most appropriate term for the described notation.