What is “Electronic Suppression Software” (ESS)? It’s the computer equivalent of the old accounting scam of keeping two sets of books -- the one where you record the real profits of the business, and the one you show to the tax department <https://www.nzherald.co.nz/business/ird-warns-businesses-of-severe-consequences-of-using-illegal-software-tool/US47OGOUX5G6NEZAG5OAYP27G4/>. This software seems to work at retail point-of-sale (tills). There have been some international raids lately on those suspected of supplying or using such tools.