Triplicate/ˈtrɪplɪkət/ Definition 1 of 3Pro Tip 1/3Official Documents Often used for formal paperwork where identical copies are needed for multiple stakeholders. Please fill out the application form in triplicate. Pro Tip 2/3Equal Copies All three copies produced will be identical and hold the same legal value. The lease agreements must be in triplicate for each party involved. Pro Tip 3/3Redundancy Avoidance Used when backup copies are crucial, to prevent loss of crucial information. Your insurance claim form needs to be submitted in triplicate.