> For the complete documentation index, see [llms.txt](https://support.backpack.exchange/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.backpack.exchange/exchange/security/2fa/fixing-google-authenticator-code-errors.md). # Fixing Google Authenticator Code Errors The most common fixes for OTP (One Time Pass) code issues: 1. Look for OTP code in your 2FA app **(not email)**. 2. Sync your 2FA app device and Exchange login device to **the same timezones.** 3. Do you have **multiple 2FA apps** downloaded? Make sure you're checking in the correct one. **If you cannot resolve OTP issues after verifying the above solutions please reach out to Support via ** --- # 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://support.backpack.exchange/exchange/security/2fa/fixing-google-authenticator-code-errors.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.