# 20404: Not Found

Log Type: APPLICATION

Log Level: ERROR

## Description

This error occurs when you request a resource that Twilio cannot find. Common reasons include using an incorrect or deleted SID, sending a malformed request path, using the wrong resource name or casing, or sending the request to the wrong product base URL.

### Possible causes

* The SID in the request does not exist, or the resource existed previously and has since been deleted.
* A Verify Verification SID was approved or expired and then soft deleted. After that happens, requests to that Verification resource return 20404.
* The request path points to a resource that does not exist, such as using `TwilioCalls` instead of `Calls`, or the path uses the wrong casing.
* A required SID is missing or empty in the request path, which produces a malformed URL.
* The request was sent to the wrong host or base URL for the product you are calling. Core REST API resources use `https://api.twilio.com/2010-04-01`. Verify uses `https://verify.twilio.com/v2/`.

### Possible solutions

* Use the exact SID returned by the resource create or list response, and send the request to the documented endpoint for that resource. For example, Call resources use `/Accounts/{AccountSid}/Calls/{Sid}.json`, and Verify fetches use `/Services/{ServiceSid}/Verifications/{Sid}`.
* For Verify, do not fetch a Verification resource after it has been approved or expired. Use the Verification Check endpoint to validate the code, or start a new verification if you need a new verification attempt.
* Match the resource name and path casing exactly as documented. Use `Calls`, not `TwilioCalls` or `calls`.
* Validate every path value before sending the request. Ensure `AccountSid`, `ServiceSid`, `CallSid`, and `VerificationSid` values are present and non-empty.
* Use the correct product host and base URL for the endpoint you are calling. Do not send core REST API requests to `https://twilio.com` or `https://www.twilio.com`.

#### Additional resources

* [Twilio API overview](/docs/usage/api)
* [Verify API](/docs/verify/api)
* [Call resource](/docs/voice/api/call-resource)