Application of the São Paulo State Treasury to verify Tax Receipt and Electronic Invoice Electronic Consumer issued in the State of São Paulo. Through the phone's camera, scan the QR Code printed on the Electronic Tax Receipt extract to see if it was generated from the data of a SAT equipment regularly recorded in the Department of Finance. The SAT equipment is new equipment that generates the Fiscal Electronic Coupon and transmits it via Internet to the Department of Finance, replacing the Tax Receipt paper and fiscal printers. The app also displays the main data of purchase. It can also be used for reading the QR code DANFE of Fiscal Electronic Consumer Note, in which case you see all the purchase data. Should not be used for reading other types of QRCode.