> For the complete documentation index, see [llms.txt](https://cee-systems.gitbook.io/tcp/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cee-systems.gitbook.io/tcp/starting-with-exchange/required-check.md).

# Required check

Here it is necessary to confirm that you have read the relevant Fare rules and reviewed all necessary ticketing data.

![](https://2703445587-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LDpSnMrEGo2nnLMQ8Se%2F-M9wPkVNB6WRtSQGYbCe%2F-M9x7W55lPwAEFRfatGR%2Fimage.png?alt=media\&token=b18a53b4-dce4-418e-97dd-90efda083107)

The warning message when the *schedule changes* option is used.

![](https://2703445587-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LDpSnMrEGo2nnLMQ8Se%2F-M9wPkVNB6WRtSQGYbCe%2F-M9x7dqr86LgT59T37b6%2Fimage.png?alt=media\&token=1e118bd4-f922-4851-b661-4d03ff5c2362)

The warning message in case of an IT/BT ticket.

![](https://2703445587-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LDpSnMrEGo2nnLMQ8Se%2F-M9wPkVNB6WRtSQGYbCe%2F-M9x7kk4xJgfbzYx8GxO%2Fimage.png?alt=media\&token=e7082dd0-9a07-487f-9e00-415ad94cef68)

When all items have been confirmed, TCP Exchanges & Refunds service creates masks necessary for the exchange.

![](https://2703445587-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LDpSnMrEGo2nnLMQ8Se%2F-M9wPkVNB6WRtSQGYbCe%2F-M9x82IiStx5OkuZfErl%2Fimage.png?alt=media\&token=9e173082-f0a6-488a-9c4f-c25d3b42daba)