Type of the field validation that is applied to optional fields (zipCode, street1, street2, state, countryCode, transactionCode, customerAccountCode) in the submitted request.
Possible values:
- Validate - if an invalid field value is submitted, the HPP request fails and validation error is shown on the screen. Used by default.
- Cleanup - if an invalid field value is submitted, the HPP request is processed but invalid symbols in the values are cleaned up (replaced with gaps).