Validate VAT 5 Certificate

---

POST /api/utility/validate-vat5-certificate

Purpose: Check that a VAT 5 certificate is genuine, valid (not expired), and has sufficient remaining quantity for a project.

Request Body

{
  "projectNumber": "PRJ-123",
  "certificateNumber": "VAT5-0001",
  "quantity": 100
}

Response

{
  "statusCode": 1,
  "remark": "string",
  "data": {
    "projectNumber": "PRJ-123",
    "vat5CertificateNumber": "VAT5-0001",
    "quantity": 100,
    "dateOfIssue": "2026-01-14T07:42:26.743Z",
    "dateOfExpiry": "2026-02-14T07:42:26.743Z",
    "isValid": true
  },
  "errors": null
}

Typical Use

• Call before issuing an invoice that relies on VAT 5 relief.
• If statusCode != 1 or data.isValid == false, block the relief and show remark / errors to the user.