> 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.

![](/files/-M9x7W55lPwAEFRfatGR)

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

![](/files/-M9x7dqr86LgT59T37b6)

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

![](/files/-M9x7kk4xJgfbzYx8GxO)

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

![](/files/-M9x82IiStx5OkuZfErl)