invoiceHeader_vatInvoiceReferenceNumber {#invoice-header-vat-invoice-reference-num}
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VAT invoice number associated with the transaction.  
This field is available only on these processors: `Elavon Americas`, `FDC Nashville Global`, `Visa Platform Connect`, `TSYS Acquiring Solutions`, `Worldpay VAP`.

Specifications {#invoice-header-vat-invoice-reference-num_d32e39}
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* **Data Type:** String
* **Data Length:** 15

Mapping Information {#invoice-header-vat-invoice-reference-num_d32e58}
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* REST API Field: orderInformation.invoiceDetails.vatInvoiceReferenceNumber
* SCMP API Field: vat_invoice_ref_number
* Simple Order API Field: invoiceHeader_vatInvoiceReferenceNumber

Processor Field Names {#invoice-header-vat-invoice-reference-num_d32e82}
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This list provides the Level II/Level III processor field name for each processor that supports Level II or Level III data:

* `Elavon Americas`: VAT Invoice Reference Number (Unique)
* `FDC Nashville Global`: VAT Invoice Reference Number
* `TSYS Acquiring Solutions`: Unique VAT Invoice Reference Number
* `Visa Platform Connect`: vatInvoiceReferenceNumber
* `Worldpay VAP`: Invoice Reference Number