# 60200: Invalid parameter

Log Type: APPLICATION

Log Level: ERROR

## Description

The response `message` contains the name of the invalid parameter.

HTTP status: 400

Example where `To` is the invalid parameter:

```bash
{
    "code": 60200,
    "message": "Invalid parameter: To",
    "more_info": "https://www.twilio.com/docs/errors/60200",
    "status": 400
}
```

### Possible causes

When [starting a verification](/docs/verify/api/verification#start-new-verification):

* `To` parameter is incorrectly formatted or missing the leading `+`.
* `Channel` parameter is not one of the [accepted options](/docs/verify/api/verification#start-new-verification), or you might not have access to the requested channel.

When [checking a verification](/docs/verify/api/verification-check#check-a-verification):

* `Code` parameter is not between 4-10 numbers long.

When [creating a service](/docs/verify/api/service#create-a-verification-service):

* `FriendlyName` is too long (max 30 characters).

When [fetching a service](/docs/verify/api/service#fetch-a-service):

* Neither `ServiceSid` nor `UniqueName` is present.

### Possible solutions

* Use strict [E.164 formatting](/docs/glossary/what-e164), including the `+` sign, for phone numbers in the `To` parameter. Example: `+15017122661`.
* If using the `sna` channel, ensure you have requested and been granted access. See [SNA Overview](/docs/verify/sna) for details.