get https://api.cm.com/voice-phonenumberrequestapi/v1/numberrequests//requirements
Because of different rules and regulation in different countries, we may need additional information (for example documents) after your request has been created. The required information will be checked by our support staff. Necessary documents can later be requested via email. With this endpoint you can retrieve the additional information based on the country related to the request.
If the response contains only an empty array, it means the country that the request is bound to does not require any information.