# Cash book When performing a sales operation, collecting customer debt... the system will automatically generate a receipt in the cash book recorded for this cash flow. And for payment transactions when importing goods, paying debts to suppliers... the system will also generate a corresponding payment slip to record this operation. In business, receipts are created when there is an inflow of cash. Payslips are generated when there is a cash outflow. Nobita will instructions you: * [Create and manage payment vouchers](/nobi-pos/cash-book/payment-voucher.md). * [Create and manage receipt ](/nobi-pos/cash-book/receipt.md) Right now, let's explore with Nobita the creation and management of different types of cash books! --- # Agent Instructions: 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: ``` GET https://help.nobi.pro/nobi-pos/cash-book.md?ask= ``` The question should be specific, self-contained, and written in natural language. 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.