The Boonville Area Chamber of Commerce issued a statement regarding a report from a business in Boonville about a scam going around. The company goes by the name of Credit Card Association and claim that they work for VMS (Visa, Mastercard Services).
The report states that the company will tell you that you have been overcharged on your merchant account and that if you could fax them a copy of your most recent statement they could verify and get you some money back that you have overpaid.
This is just a phishing scam and they are trying to obtain your personal and business information for their gain.
This scam has been used for personal credit cards in the past and it appears that they have now moved on to merchants.