curl --request GET \
  --url https://api.sandbox.paypathiq.com/v1/clients/{clientCode}/payment-requests/{externalPaymentRequestId}/receipt-delivery \
  --header 'Authorization: Bearer <token>'

{
  "acknowledgement": {
    "allocatedAmount": {
      "amount": "300.00",
      "currency": "EUR"
    },
    "matchedAmount": {
      "amount": "0.00",
      "currency": "EUR"
    },
    "status": "pending",
    "unmatchedAmount": {
      "amount": "300.00",
      "currency": "EUR"
    }
  },
  "capability": {
    "disabledReason": "no_verified_route",
    "state": "disabled",
    "unverifiedRoutes": [
      {
        "missingProof": "Blockman documents read endpoints only; no receipt-posting endpoint is verified.",
        "route": "blockman_receipt_posting"
      }
    ]
  },
  "deliveryOwner": "paypathiq",
  "externalPaymentRequestId": "PAYREQ_EXAMPLE"
}

{
  "detail": "API key is invalid, inactive, revoked, or for another environment.",
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 401,
  "title": "API key is invalid, inactive, revoked, or for another environment.",
  "type": "https://docs.paypathiq.com/problems/invalid_api_key"
}

{
  "detail": "The Client code is unknown, the grant lacks the required scope, or the calling address is outside the grant's IP allowlist.",
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 403,
  "title": "The Client code is unknown, the grant lacks the required scope, or the calling address is outside the grant's IP allowlist.",
  "type": "https://docs.paypathiq.com/problems/client_scope_denied"
}

{
  "detail": "No Payment request exists at this authorized reference.",
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 404,
  "title": "No Payment request exists at this authorized reference.",
  "type": "https://docs.paypathiq.com/problems/payment_request_not_found"
}

{
  "detail": "The Payment request has no provider-confirmed Payment to deliver.",
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 409,
  "title": "The Payment request has no provider-confirmed Payment to deliver.",
  "type": "https://docs.paypathiq.com/problems/payment_not_confirmed"
}

{
  "detail": "Route parameters or the representation are invalid. Route parameters are checked before authentication. Field errors carry a code such as invalid_format, unrecognized_keys, custom, sensitive_external_id, or sensitive_source_reference.",
  "errors": [
    {
      "code": "invalid_format",
      "detail": "Invalid ISO date",
      "pointer": "/dueDate"
    }
  ],
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 422,
  "title": "Route parameters or the representation are invalid. Route parameters are checked before authentication. Field errors carry a code such as invalid_format, unrecognized_keys, custom, sensitive_external_id, or sensitive_source_reference.",
  "type": "https://docs.paypathiq.com/problems/validation_error"
}

{
  "detail": "Each API key may send 60 requests per minute and run 1 request at a time. In sandbox, the same limits also apply per Client across all of its keys. Every request, including GET, counts.",
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 429,
  "title": "Each API key may send 60 requests per minute and run 1 request at a time. In sandbox, the same limits also apply per Client across all of its keys. Every request, including GET, counts.",
  "type": "https://docs.paypathiq.com/problems/rate_limit_exceeded"
}

{
  "detail": "An unexpected error prevented a safe commit, and nothing was saved. Retry with backoff.",
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 503,
  "title": "An unexpected error prevented a safe commit, and nothing was saved. Retry with backoff.",
  "type": "https://docs.paypathiq.com/problems/projection_unavailable"
}