curl --request PATCH \
  --url https://sg.sandbox.api.reap.global/card-shipments/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Reap-Version: <reap-version>' \
  --data '
{
  "courier": {
    "type": "POSTAL"
  }
}
'

const options = {
  method: 'PATCH',
  headers: {
    'Reap-Version': '<reap-version>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({courier: {type: 'POSTAL'}})
};

fetch('https://sg.sandbox.api.reap.global/card-shipments/{id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://sg.sandbox.api.reap.global/card-shipments/{id}"

payload = { "courier": { "type": "POSTAL" } }
headers = {
    "Reap-Version": "<reap-version>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.patch(url, json=payload, headers=headers)

print(response.text)

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "status": "DRAFT",
  "destinationAddress": {
    "line1": "<string>",
    "line2": "<string>",
    "zone": "<string>",
    "city": "<string>",
    "postalCode": "<string>",
    "country": "US"
  },
  "recipient": {
    "firstName": "<string>",
    "lastName": "<string>",
    "phoneNumber": "<string>",
    "dialCode": 123,
    "email": "jsmith@example.com"
  },
  "courier": {
    "type": "POSTAL"
  },
  "trackingNumber": "<string>",
  "trackingUrl": "<string>",
  "cutoffDate": "<string>",
  "createdAt": "<string>",
  "updatedAt": "<string>",
  "submittedAt": "<string>",
  "deliveredAt": "<string>"
}

{
  "error": {
    "code": "CARD_NOT_PHYSICAL",
    "message": "<string>",
    "detail": {}
  }
}

{
  "error": {
    "code": "CARD_SHIPMENT_CARD_NOT_FOUND",
    "message": "<string>",
    "detail": {}
  }
}

{
  "error": {
    "code": "ACTIVE_CARD_SHIPMENT_EXISTS",
    "message": "<string>",
    "detail": {}
  }
}