Any business that “sells across” the scale, or uses the scale to determine to price for the acquisition or sale of commodities, must obtain scale certification in order to operate legally. Scales that have been certified make it easier to verify that the weight indicated on the scale’s weight indicator accurately represents the weight of the goods. A flawed or inaccurate scale may cause the buyer to pay for more products than they actually received, or it may cause the buyer to charge less than the product was actually worth. The Armour Scale company, a state-licensed service provider, must be able to show that the scale generates precise measurements. State-licensed service providers test scales using NIST traceable certified test weights to certify them as scales.