> 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-complete-online-documentation/chap-4-point-of-sale-control/help-contents/workstation/options/invoice.md). # Invoice The Invoice option from the Workstation menu allows to display messages on the guest check. There are 6 lines of 30 characters each for a guest check and an additional 5 lines of 30 characters each to get the customer information needed for room charge entry. You must type the authorization message separately for each workstation. This option gives you more flexibility since you can change the messages for the different locations of your workstation. For the room charge message, instead of typing the same text on every workstation, you can link every workstation room charge message to another one with the appropriate text. **Authorization** **Line 1 to Line 6** Type in these fields the lines of the message. This message appears on every guest check, following the total of the check. **Room charge** **Line 1 To Line 5** Type in these fields the lines of the message to print on the room charge guest check. **Same As** Instead of typing the same text on every workstation setup screen, use this field to link this workstation setup screen to another one that already has the appropriate --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.payfacto.com/payfacto-knowledge/maitred-pos/maitred/maitred-complete-online-documentation/chap-4-point-of-sale-control/help-contents/workstation/options/invoice.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.