post https://project-api.zapehr.com/v1/fax/offboard
Offboard a fax number. Oystehr's offboard feature makes it easy to stop using the fax service and release the project's assigned fax number with a single API call. Please note there is no way to guarantee getting the same number back again, so if you think this can break your project in any way we recommend not offboarding and avoid sending faxes until you're sure.
Access Policy Requirements:
Action: Fax:Offboard
Access Policy Resource: Fax:Number