whats the term used to describe sending the same message to a system and receiving the same response

Question

I"m looking for a term here.

in messaging systems you send a request, and it processes and sends a response.

if that same request is sent it should return the same response, (but not necessarily process the details)

This would be like submitting financial details twice.

Answer 1

Is the term "idempotent" what you have in mind?