Do you use Visual Voicemail? Have you checked to see if you have a voicemail?
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.
We definitely want to ensure that notifications are cleared, Lorinda. You may need to clear cache / data from the application. This would depend on which default messaging app you're using. ( Settings > Applications > Manage Apps > All > Messaging )
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