• Duplicious: [etymology: duplicate + delicious.] This is a word. It can mean so good it should be shared by all. (“I sent that duplicious tune to all my friends on facebook.”)
• Duplicitous can mean two-faced or deceptive. (“Watch out! He is one duplicitous hombre!”)
• Duplicative can mean repetative or the same again, again. [etymology from Late Latin duplicitās a being double, from Latin duplex ] (“This appears to be a duplicative request.”)

Watch what you say when you want to mean what you say.

This phrase was found in a letter to a requester who asked for a copy of private records: “Your request is duplicious.”  (“A governmental entity is not required to fulfill a person’s records request if the request unreasonably duplicates prior records requests from that person.” [see UCA 63G-2-201(8)(a)(iv)] )

Do you really mean it? Translation: (“That was such a fine request, we want to share the record you requested with everyone !”)