> For the complete documentation index, see [llms.txt](https://docs.payfacto.com/payfacto-knowledge/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payfacto.com/payfacto-knowledge/maitred-pos/maitred/maitred-pa-dss-implementation-guide/pa-dss-requirement-7.2.3/system-verification.md).

# System verification

After the service pack has been applied, check the entire system to ensure that everything is working correctly:

* Check that all workstations are operational
* Verify that all peripherals are working correctly, such as receipt printers, bar and kitchen printers, customer displays, card readers, PIN Pads, etc.
* Use a training employee to test all the normal sales operations.
* Logon to the back-office and test daily administration and management duties, such as verifying punch cards, taking back-office reports, etc.
* If possible, test a credit and a debit transaction to ensure that all systems are up and running before customers start showing up.