I agree, this is a scam. I work for a client who had turnover of their receptioninst, and "Preferred Merchant Supplies" managed to ship a 20lb box of credit card tape and then charge my client $500.00. I had my client's new receptionist call and get a return shipping authorization, and to return the order. They said they would not pay the shipping, and were reportedly hostile.
I tried several times unsuccessfully to contact PFS. Doing some investigative work, I went to the Florida State website and discovered that PFS is a "fictitious name", and that the owners of the company are also in other business ventures including "Dieuvil Financial Services" in Miami.
Being suspicious, I contacted the Florida State AG and was referred to the Federal Trade Commission website where it states that highly overpriced and unauthorized shipments of product received are to be considered a gift. Thanks for the credit card tape!
If anyone gets caught up with PFS, I would discontinue any communication, and let all vendors know you require PO#s. That way no scams will get through your defenses.
Amending my post...
In error I referred to Preferred Merchant Supplies as PFS, not PMS. Not to be offensive but hmmm, ironic?