---
page_type: error
code: 64020
message: "64020: Pay: Invalid Parameter Value"
level: ERROR
product: Programmable Voice
---

## Description

A 64020 Error is an indication that one or more of the values provided for an attribute or parameter are invalid.

### Possible Causes

- Misspelled parameter values
- Incorrect format for parameter values
- Unexpcted value for one or more parameters

### Possible Solutions

- Ensure that values match what is expected by refering to the API and TwiML docs