curl --request DELETE \
  --url https://api-m.sandbox.paypal.com/v2/invoicing/invoices/{invoice_id}/refunds/{transaction_id} \
  --header 'Authorization: Bearer <token>'

{
  "name": "INVALID_REQUEST",
  "message": "Request is not well-formed, syntactically incorrect, or violates schema.",
  "details": [
    {
      "issue": "<string>",
      "field": "<string>",
      "value": "<string>",
      "location": "body",
      "description": "<string>"
    }
  ],
  "debug_id": "<string>",
  "links": [
    {
      "href": "<string>",
      "rel": "<string>"
    }
  ]
}

{
  "name": "NOT_AUTHORIZED",
  "message": "Authorization failed due to insufficient permissions.",
  "details": [
    {
      "issue": "PERMISSION_DENIED",
      "field": "<string>",
      "value": "<string>",
      "location": "body",
      "description": "The requested invoice is not associated with the requested user."
    }
  ],
  "debug_id": "<string>",
  "links": [
    {
      "href": "<string>",
      "rel": "<string>"
    }
  ]
}

{
  "name": "RESOURCE_NOT_FOUND",
  "message": "The specified resource does not exist.",
  "details": [
    {
      "issue": "<string>",
      "field": "<string>",
      "value": "<string>",
      "location": "body",
      "description": "<string>"
    }
  ],
  "debug_id": "<string>",
  "links": [
    {
      "href": "<string>",
      "rel": "<string>"
    }
  ]
}

{
  "name": "INTERNAL_SERVER_ERROR",
  "message": "An internal server error occurred.",
  "debug_id": "90957fca61718",
  "links": [
    {
      "href": "https://developer.paypal.com/api/orders/v2/#error-INTERNAL_SERVER_ERROR",
      "rel": "information_link"
    }
  ]
}

{
  "name": "INVALID_REQUEST",
  "message": "Request is not well-formed, syntactically incorrect, or violates schema.",
  "details": [
    {
      "issue": "<string>",
      "field": "<string>",
      "value": "<string>",
      "location": "body",
      "description": "<string>"
    }
  ],
  "debug_id": "<string>",
  "links": [
    {
      "href": "<string>",
      "rel": "<string>"
    }
  ]
}