Memo vs ia

Memorandum. An informal record, in the form of a brief written note or outline, of a particular legal transaction or document for the purpose of aiding the parties in remembering particular points or for future reference. A memorandum may be used in court to prove that a particular contract was made.

You usually make interlocutory applications after issuing court proceedings but before the final hearing date.

An IA is a motion for equitable or legal relief sought before a final decision