1. Introduction
When accepting American Express payments via the acquirer Alpha Card you can send the following additional invoice information along with the order details.
Please note that there might be cases of acquirers not supporting these fields on their side.
2. Transmitting the Invoice Information
You can send the additional invoice information along via e-Commerce, e-Terminal, Batch and DirectLink.
2.1 e-Commerce
The following hidden fields are used to transmit the additional invoice information to our system via e-Commerce:
<input type="hidden" name="INVORDERID" value="">
<input type="hidden" name="INVDATE" value="">
<input type="hidden" name="AMOUNTHTVA" value="">
<input type="hidden" name="AMOUNTTVA" value="">
Field |
Explanation |
INVORDERID |
Invoice reference |
INVDATE |
Invoice date to appear in bank files |
AMOUNTHTVA |
Total invoice amount (VAT excl.) (* 100 to avoid decimals) |
AMOUNTTVA |
Total invoice VAT amount (* 100 to avoid decimals) |
The information will be displayed on the e-Commerce screen
For further information, go to e-Commerce.

2.2 DirectLink
The following parameters are used to transmit the additional invoice information to our system via DirectLink:
Field |
Explanation |
INVORDERID |
Invoice reference |
INVDATE |
Invoice date to appear in bank files |
AMOUNTHTVA |
Total invoice amount (VAT excl.) (* 100 to avoid decimals) |
AMOUNTTVA |
Total invoice VAT amount (* 100 to avoid decimals) |
For further information, go to DirectLink.
2.3 Batch
The following fields are used to transmit the additional invoice information to our system via Batch:
Field Content |
Field number |
Invoice number |
6 |
Invoice date to appear in bank files |
28 |
Total Invoice amount (VAT excl.) (* 100 to avoid decimals) |
32 |
Total Invoice VAT amount (* 100 to avoid decimals) |
33 |
For further information, go to Batch.
2.4 e-Terminal
The additional invoice information can be entered in the e-Terminal transaction voucher.

For further information, go to e-Terminal.
3. Field specifications
Following are the technical specifications for the additional fields:
Data |
Format |
Max. Length |
Invoice number |
AN |
15 (Amex:12) |
Invoice date to appear in bank files |
MM/DD/YY |
8 |
Total Invoice amount (VAT excl.) |
N |
12 |
Total Invoice VAT amount |
N |
12 |
4. Transaction feedback
The additional invoice information will be visible in the order details in the back office and will also be shown on the customer’s bank statement.