I got multiple calls from this number at my work today.  The company name that showed up on my caller ID was "Postal Express".  When I googled the company name, it was a real company but the number didn't match up to any of their contact info.  The lady who called me was trying to get names, numbers, etc.  When I asked what this was regarding, she responded by saying "You owe us money, its for an invoice."  I then asked her what the products were/what we owed money for and she responded "They are packages".  I asked what the packages were/what was the product and she didn't have an answer.  I asked her what her name was, her company, etc. and she said "You tell me your name first".  After repeating myself multiple times that I do not give out information unless I know what it is regarding, I finally gave up and hung up on her.  She called back and by the third phone call, she was frusterated that I didn't give her information.  I told her that I do not give out information unless I know what it is for.  She said she would find a way to contact my supervisor and that I am a bad person and I work for a bad company!