> For the complete documentation index, see [llms.txt](https://faq.blink.sv/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://faq.blink.sv/using-blink/when-do-lightning-invoices-expire.md). # When do lightning invoices expire? The BOLT11 invoices generated by Blink expire after\ \* 2 hours using the Bitcoin account\ \* 5 minutes for the USD account.\ \ If an invoice has expired it cannot be paid.\ \ Other means to pay a Blink user are:\ \- Lightning Address: `username@blink.sv`\ \- static Paycode (also known as LNURLpay code) at `https://blink.sv/username`\ \- Point of Sale at `https://pay.blink.sv/username`\ \- an onchain bitcoin address for higher amounts --- # 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 by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://faq.blink.sv/using-blink/when-do-lightning-invoices-expire.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. 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.