curl --request POST \
  --url https://cases.platform.arb.inc/service-of-notice/mail-types/list \
  --header 'Authorization: Bearer <token>'

{
  "mailTypes": [
    {
      "id": "certified_mail",
      "displayName": "Certified Mail",
      "description": "USPS Certified Mail with return receipt"
    }
  ]
}