Automated sales suppression device

Most jurisdictions levy a sales tax or a value added tax on commercial transactions such as sales in stores or food served in a restaurant. These transactions are now most often recorded by a POS system rather than a mechanical cash register. The POS system records are generally not alterable by the operator and are used as the basis of tax assessments and audits by tax authorities.

Because POS systems are increasingly designed as general purpose computers (as of 2008, 85% worldwide were reported to run Microsoft Windows),[1] arbitrary software can be run on them. A "zapper" is a software program, often run untraceable from a USB flash drive, that accesses the POS system records and allows the owner of a business to alter the records so as to make it credibly appear that fewer transactions have occurred than has actually been the case. This reduces the tax burden on the business, which is generally proportional to the volume of the transactions.

The use of zappers is illegal and may be subject to criminal penalties. However, according to a 2008 The New York Times report, governments worldwide have yet to find effective means of preventing their use.[1] A European Union committee on cash register fraud has been established, and legislation mandating tamper-proof POS systems has been proposed in Germany in 2008 (INSIKA) and introduced in Quebec, Canada, on September 1, 2010.[1]

In Canada, legislation aimed at suppressing zappers is in effect since 1 January 2014. A first offence will lead to a $5,000 fine, and subsequent infractions to a $50,000 fine. Persons in possession of zappers could be fined up to $50,000, and developers or sellers up to $100,000.[2]

In Australia, activities involving electronic sales suppression tools that relate to people or businesses that have Australian tax obligations are banned since 4 October 2018, and subject to criminal and administrative penalties.[3]

• Electronic Sales Suppression: A threat to tax revenues, OECD