Invoice status update via AR API fails due to incorrect payload structure in request

ERP Infor CloudSuite
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1

Our payment reconciliation process is breaking because the AR API keeps rejecting invoice status updates. We’re trying to mark invoices as paid after processing payments through our external system, but getting validation errors on the payload structure.

Current request that fails:

PUT /api/v1/ar/invoices/INV-2025-0234/status
{
  "status": "paid",
  "payment_date": "2025-02-07",
  "payment_amount": 12500.00
}

Error: “Invalid request structure. Required fields missing.” The API documentation we’re using seems outdated for ICS 2021. We’ve tried different field names and structures but can’t get it to accept our updates. The test endpoint isn’t available in our environment. Anyone know the correct payload structure for invoice status updates in the AR API?

2

The schema endpoint Aaron mentioned isn’t available in ICS 2021 unfortunately. That came in 2022. You’ll need to work with the actual endpoint but you can use a dedicated test invoice. Create a dummy invoice in your system specifically for API testing and use that invoice ID for all your validation attempts.

3

For payload validation without a test endpoint, use the API schema endpoint if available: GET /api/v1/ar/invoices/schema. This returns the JSON schema with required fields marked. If that’s not available in your version, try sending a POST to /api/v1/ar/invoices/validate with your payload - some versions support validation-only mode that doesn’t commit changes. Also check your API version header - make sure you’re specifying the correct version that matches your ICS release.

4

The AR API in ICS 2021 requires nested payment details. You can’t just send flat fields. Try wrapping payment info in a payment_details object with additional required fields like payment_method and reference_number.

5

I had the exact same issue last month. The documentation is definitely outdated. You need to include the customer_id and currency_code even though they’re already associated with the invoice. The API doesn’t infer these from the invoice record. Also, payment_date format must be ISO 8601 with timezone. Check if you’re sending “2025-02-07” instead of “2025-02-07T00:00:00Z”.

6

Here’s the complete solution covering all three aspects:

Payload Structure Validation: The AR API in ICS 2021 requires a specific nested structure with mandatory fields that aren’t well documented. Here’s the correct format:

PUT /api/v1/ar/invoices/INV-2025-0234/status
{
  "status": "paid",
  "customer_id": "CUST-10234",
  "currency_code": "USD",
  "payment_details": {
    "payment_date": "2025-02-07T00:00:00Z",
    "payment_amount": 12500.00,
    "payment_method": "WIRE_TRANSFER",
    "reference_number": "PAY-2025-0891"
  }
}

Key requirements: customer_id and currency_code must match the invoice record exactly (case-sensitive). The payment_details object is mandatory even for simple status updates. Payment_method must be one of the enumerated values: WIRE_TRANSFER, CHECK, CREDIT_CARD, ACH, CASH. The reference_number is required for audit trail purposes.

API Documentation Review: The ICS 2021 documentation has known gaps for the AR API. Here’s how to work around it:

  1. Use the error messages as documentation - they often reveal required fields. Send a minimal payload and incrementally add fields based on error responses.

  2. Check the response headers for API version info:


GET /api/v1/ar/invoices/INV-2025-0234
Response Headers:
X-API-Version: 2021.2.1
X-Schema-Version: 1.4
  1. Query an existing invoice to see the full data structure:

GET /api/v1/ar/invoices/INV-2025-0234?include=payment_details,audit_trail

This shows you the complete object model including nested structures.

  1. The official documentation is in Infor Support Portal under “CloudSuite Financials API Reference 2021.2” - make sure you’re using the version-specific guide, not the generic one.

Test Endpoint Usage: Since ICS 2021 doesn’t have a dedicated test endpoint, implement this validation strategy:

Create a validation wrapper that performs pre-flight checks:


// Pseudocode - Validation workflow:
1. Query invoice GET /api/v1/ar/invoices/{id} to verify it exists
2. Check invoice.status != 'paid' (can't update already-paid invoices)
3. Verify payment_amount <= invoice.outstanding_balance
4. Validate customer_id matches invoice.customer_id
5. Confirm currency_code matches invoice.currency_code
6. Only then send the PUT request

For testing new payload structures, use a dedicated test invoice that you create specifically for API validation. Set up a test invoice with a small amount ($0.01) and use it repeatedly for structure testing. This prevents polluting your production data with failed update attempts.

Implement comprehensive error logging to capture the full API response including error codes and field-specific validation messages:

{
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request structure",
    "details": [
      {"field": "payment_details.reference_number", "issue": "required field missing"},
      {"field": "currency_code", "issue": "must match invoice currency"}
    ]
  }
}

The details array provides field-level validation feedback that helps you correct the payload structure. Always check this in your error handling logic.

One final note: payment reconciliation requires that you also update the GL accounts if you’re using integrated accounting. Add the “update_gl”: true flag to your payload to ensure the general ledger reflects the payment. Without this, your AR aging reports will be correct but GL balances won’t match.

7

Thanks for the hints. I added customer_id and fixed the date format, but still getting validation errors. The nested payment_details structure makes sense but I’m not sure what all fields are actually required versus optional. Is there a way to validate the payload structure without hitting the production endpoint repeatedly?