A QR code (Quick Response code) is a module for storing information in a dot matrix or in a two-dimensional barcode. It was created in 1994 by the Japanese company Denso Wave, a Toyota subsidiary, in logistics and warehouse management.
It presents three squares in the corners that allow the reader to detect the position of the code. The goal of the creators (a two-person team at Denso Wave, led by Masahiro Hara) was for the code to allow its content to be read at high speed. QR codes are very common in Japan, where they are the most popular two-dimensional code.
In trade matters, the QR code will transmit the electronic document indicating the following information to the customs electronic system:
a) Request number, type of operation, customs code, customs clearance section, patent or authorization of the customs agent, customs representative or legal representative, as appropriate.
b) Those indicated in Annex 22, Appendix 17, according to the operation in question.
c) Economic number of the box or container and plates.
d) The CAAT in accordance with rule 2.4.6.
e) The others that are indicated in the guidelines issued for this purpose by the AGA, which will be announced on the website www.sat.gob.mx.
f) Quantity of merchandise in a unit of marketing measure that is dispatched.
The transmission will be carried out by capturing the data declared by the legal representative, the agent or customs representative on the electronic page www.sat.gob.mx, in which the format "Operation document for customs clearance ", with the two-dimensional barcode QR (Quick Response Code).
Likewise, the electronic document may be transmitted through a file with the format and requirements indicated in the guidelines issued for this purpose by the AGA, which will be announced on the electronic page www.sat.gob.mx, In this case, the legal representative, agent or customs representative must generate the "Operation document for customs clearance" format, in which the two-dimensional barcode QR (Quick Response Code) will be entered.
Source: http://www.dof.gob.mx/nota_detalle.php?codigo=5457305&fecha=19/10/2016