# Sender Receipts To solve the UX problem of sender confirmation without compromising receiver privacy, VeerTx utilizes a Zero-Knowledge Receipt Tracker. * How it works: When a sender deposits funds, they receive a unique tracking URL based on their one-time deposit address (`/receipt?address=...`). * Privacy Guarantee: The endpoint strictly returns a binary PENDING or CLAIMED status. It mathematically cannot expose the receiver's destination wallet or withdrawal transaction signature. * Timing Attack Mitigation: To prevent on-chain timing correlation attacks, the system introduces a randomized 5 to 15-minute delay after the receiver withdraws their funds before the public receipt status flips to CLAIMED. --- # 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://veertx.gitbook.io/veertx-docs/how-it-works/sender-receipts.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.