The ECPay e-invoice integration helps issue e-invoices to your customers through emails. This article covers the registration, integration set up, and order processing flow to issue e-invoices with ECPay.

This article should be read in conjunction with the article on the configuration of the Invoice Information interface under the Oddle Shop checkout page.

1. ECPay E-invoice Registration

Before using ECPay e-invoice integration, it is necessary to first apply for an ECPay business account. Find out more about ECPay e-invoice service here. ECPay charges apply.

2. E-invoice Integration Set Up

Step 1: Log in to the ECPay merchant dashboard with your ECPay business account log in details.
Step 2: Click on '系統開發管理' > '系統介接設定'
Step 3: Note the values of '商店代號', '介接 HashKey', and ''介接 HashIV' for '電子發票'.

Step 4: Log in to your Oddle dashboard here.
Step 5: Click on your menu name > 'Invoice'
Step 6: Ensure that the 'Show e-invoice interface' radio button is selected.
Step 7: Enable the toggle for '綠界科技ECPay e-invoice'.
Step 8: Enter the '商店代號', '電子發票介接 HashKey', and '電子發票介接 HashIV' under Step 3.

Step 9: Click on 'Save' to complete the integration.

3. Management of E-invoices from Oddle Dashboard

For merchants under Oddle Lite plan

E-invoice is immediately issued once online payment is received from your customer.
When online refund is made, an allowance will be automatically issued against the corresponding e-invoice.
If there are changes to the following e-invoice related fields of an order after the e-invoice has been issued, a new e-invoice will be re-issued to replace the former e-invoice:

Unified Business Number (統一編號)
Organisation Name (公司名稱)
Carrier Type (載具類別)
Individual ID (載具)

For merchants not under Oddle Lite plan

E-invoice will be issued when the order payment status is changed to Paid.
Allowance will be issued against the corresponding e-invoice when the order payment status is changed to Unpaid.
Note: Do remember to update payment status to Unpaid after making a refund to issue an allowance.

4. Viewing of ECPay E-invoice Issuance Status

Once e-invoices have been issued by ECPay, your customers will receive the e-invoices according to their prefered mode of issuance as indicated during their checkout. Customers can also check the issuance status on Oddle Shop under their Order History where the issued e-invoice numbers will be updated.

As a merchant, you can check if e-invoice has been issued by looking for the e-invoice number under the "E-invoice No." field of the order on your Oddle dashboard or Oddle Register app.

Alternatively, you can track the e-invoices and allowances that you have issued under the E-invoice Report