The text message does not show up on my phone... but certainly did on my boss's phone... and this is the first time this has happened. I asked him if perhaps there was another cellular number linked to contact information on his phone and he said no.
@flager Best to verify if in fact the message was sent from your device without your knowledge. Access selfserve and click on usage history and check to see if an outgoing text was recorded in the logs for the specific date and time.
Are you part of a group message? The other possility is that the original sender has all replies being sent to the group. I've had it happen to me before when my sister sent out a group message and I got a reply from an unknown number asking who I was
Thanks... did check my usage and the message sent to my boss... didn't correspond to usage on my phone... so I suggested that he get his phone checked.