---
page_type: error
code: 20156
message: "20156: Expired or Invalid Expiration in Token"
level: ERROR
product: Platform
---

## Error - 20156

### Expired or Invalid Expiration in Token

The JWT provided to the Twilio API has expired, or the expiration time specified in the JWT was invalid.

#### Possible Causes

- The client system that generates the JWT might have issues with system time.
- To check whether the JWT is structurally correct, you can use the tools available at jwt.io.