sometimes the auditability of being able to say you sent the message is as important as sending the message itself, banking / telecoms etc. You keep intermixin

sometimes the auditability of being able to say you sent the message is as important as sending the message itself, banking / telecoms etc. You keep intermixing a user-to-user chitchat system (which the submitter presented) with banking and telco applications. They are not the same, they are not even closely related. ISO 15022 does not apply to twitter.