Phantom vm message

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Any one seen this before

You have received a voice mail message from Pass P, +1734xxxxx
for mailbox 103.
Message length is 00:00:14. Message size is 110 KB.

A user is receiving these whenever she gets a voicemail.
She gets a message about the actual voicemail that someone left and then she will also get a message that states message from Pass P and the phone number here at the office (main #). There is no message that is actually there though.

Any idea where this is coming from?