> For the complete documentation index, see [llms.txt](https://docs.linuxfoundation.org/lfx/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.linuxfoundation.org/lfx/my-profile/lf-events/visa-letters/updating-visa-letter-application.md).
# Updating Visa Letter Application
To correct your date of birth or passport number after submitting the visa letter application, please follow these instructions:
1. On the **Visa Letters** page, click the application that you want to edit.
2. On the next page, click to edit the passport number and DOB.
3. After updating, click **OK.**
Your application will be updated immediately.
{% hint style="info" %}
1. If your visa letter is issued, you can download it from the **LF Events> Visa Letters**.
2. Check if the passport number and DOB in your letter is correct. If not, then update your passport number and DOB and download the updated letter.
3. If any other information is incorrect in your visa letter then you need to contact the events team.\\
{% endhint %}
---
# 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.linuxfoundation.org/lfx/my-profile/lf-events/visa-letters/updating-visa-letter-application.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.