The Department of State Revenues for Zhetisu Oblast informs that in the event of a technical malfunction of a cash register machine with a function of recording and (or) data transmission, lack of electricity or connection to the telecommunications network, the cash register machine operates in an autonomous mode.
The cashier is notified of the transition of the cash register to an autonomous mode via a message.
When in an autonomous mode, the cash register machine can continue to print receipts on which an autonomous fiscal attribute is indicated. The cash register machine stores all printed receipts in its memory. At the same time, the cash register machine also generates a Z-report based on the data stored in the cash register drive.
A cash register machine without a function of recording and (or) data transmission in an autonomous mode can operate for 72 hours.
After switching to the autonomous mode of the cash register machine, the person responsible for operating the cash register machine must fill out and issue a sales receipt in the form approved by the order of the Minister of Finance of the Republic of Kazakhstan dated February 16, 2018 No. 208 "On certain issues of using cash register machines", without registering the book of sales receipts with the state revenue authorities.

Source : https://www.gov.kz/memleket/entities/kgd-zhetysu/press/news/details/982025?lang=kk