A more thorough explanation:

AD RECOGNOSCENDUM

Ad recognoscendum is a Latin term used in law that means "to recognize". It was commonly used in formal writs.

One example of the use of ad recognoscendum is in a legal document that requires a person to acknowledge a debt they owe. The document might say:

"You are hereby summoned to appear in court ad recognoscendum the debt you owe to John Smith."

Another example is in a document that requires a person to acknowledge a legal agreement they have made. The document might say:

"The parties agree to appear before a notary public ad recognoscendum the terms of this agreement."

These examples illustrate how ad recognoscendum was used in formal legal documents to require a person to acknowledge or recognize something, such as a debt or a legal agreement.