# Invalid receipt or invoice Uploaded receipts are automatically analyzed to determine if it is a valid proof of purchase (a receipt or an invoice). If we suspect that the uploaded document is not a valid proof of purchase a warning is shown next to it, along with the document type we think it is and an explanation on why it probably is not a valid proof of purchase. ### Three examples Rules around what constitutes a valid proof of purchase may differ between countries, but here are three examples of documents that rarely will be considered valid. #### Shipping confirmation Shipping confirmations are often sent after a purchase, and contain package tracking and delivery details. Those are usually not a valid proof of purchase. #### Transaction statement Transaction statements from a bank may contain some information about a purchase, but there is no details about the seller, the items bought and timestamps may be off. In short, it's generally not seen as a valid proof of purchase. #### Event ticket Event tickets, for example a concert or sports game, contain information about the event, but usually does not contain all the required details for a valid receipt. --- # 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://docs.skovik.com/for-employees/invalid-receipt-or-invoice.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.