# 64015: Pay: \`\<Pay>\` verb is missing a needed Parameter

Log Type: APPLICATION

Log Level: ERROR

## Description

A 64015 Error is an indication that the configured connector for the payment method is missing one of the Parameter needed in the `<Pay>` verb.

### Possible causes

The connector needs a specific Parameter in the `<Pay>` verb

### Possible solutions

The required parameters for the connector are listed in the "Description" section of the connector. The parameters should be passed inside the `<Pay>` verb.

Example:

```bash
<Pay>
  <Parameter name="Parameter Name" value="Parameter Value" />
</Pay
```

### Connector Specific Reasons for Error

#### Braintree

* `MerchantAccountId` is required to be passed via a `<Parameter>` noun for all Braintree `<Pay>` executions. This value can be found in the Braintree console by navigating to Settings (gear icon) -> Business.
* If passing a `description` as a parameter in `<Pay>`, you must also pass the following fields via separate `<Parameter>` nouns: `name`, `kind`, `quantity`, `totalAmount`, `unitAmount`. If you received this error you either left one of these fields out, or passed an invalid value for one of them. See [Braintree Documentation](https://developer.paypal.com/braintree/docs/reference/request/transaction/sale#line_items.description) for more information.