help with confirmation number

My carrier has required all messages to include three asterisks in every message, otherwise it will get rejected. I can put this string in any notification message, but not the message send so that a confirmation number is sent to the user's phone.

It appears to be sms_user where I would need to add something. Is there a way to add a hidden field that could contain the string?

Do other carriers do this?

I don't want to hack the module, but if others run into something like this then maybe I would turn this into a feature request.

Alternately, then I would offer support for the ability to make phone confirmation optional.

thanks

mrweaver