> For the complete documentation index, see [llms.txt](https://docs.pakk.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pakk.io/pakk-services/fulfilled-by-pakk-fbp/purchase-orders-asns.md). # Purchase Orders/ASNs Purchase Orders created in Pakk are sent to FBP as Advanced Shipping Notifications (ASNs), getting the warehouse ready to receive your shipment. The "*Send to FBP*" and "*Sync from FBP*" buttons for Purchase Orders work in a similar manner to those for Sales Orders. You cannot update orders on FBP once they have been sent. The following fields will also appear on your FBP tab: * "*FBP ASN Status*": The current status of this Advanced Stock Notification on the FBP system. * "*FBP Booked In Date*": The date the stock was booked in on FBP. In addition to those fields, "\*Goods In type and quantity, and warehouse instructions are also forwarded to FBP. **Purchase Order Rules** The following rules apply for FBP Purchase Orders: * You can only send an ASN if the deliver-to location is an FBP warehouse. * The warehouse is correctly marked in FBP depending on that selected in Pakk. * You can't send a cancelled, closed, or fully received PO. * You can't update an already sent PO. * You can't send a PO that contains only non-stockable items. --- # 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.pakk.io/pakk-services/fulfilled-by-pakk-fbp/purchase-orders-asns.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.