It means that someone is saying that he/she delivered certain documents to someone. It is typically a caption phrase appearing before a more complete statement of exactly what was delivered, how it was delivered, when it was delivered, to whom it was delivered. It is not, by itself, and "legal term" with any special meaning independent of any particular document that is used in. It may or may not have anything to do with a debt; that depends on whether the interrogatories (i.e. questions) and the motion to produce (i.e. deliver something) are asking for documents and answers related to a debt. You need to read the documents carefully to understand what is going on.
Answered on Oct 31st, 2012 at 1:29 PM