Configuring the Shopify installment payment module

In Settings > Payment providers of Shopify, click Choose alternative payment then select PayZen payment in x installments.

PayZen Payment in 3 installments corresponds to Payment in 3 installments

PayZen Payment in 4 installments corresponds to Payment in 4 installments

Access to the payment gateway
Shop ID Indicate the 8-digit shop ID, available on your Back Office (Menu: Settings > Shop > Keys).
Key Enter the key available in your Back Office (Menu: Settings > Shop > Keys).

Enter the test key if the Enable test mode box is checked in the Test mode section; enter the production key otherwise.

Note that the production key will only become available after the test phase has been completed.

Accept payments This field is used to display the card thumbnails that you want to appear on the payment method selection page.
Test mode Check this box if you want to activate the TEST mode.

The PRODUCTION mode becomes available only after the test phase has been completed.

The TEST mode is always available.

Once you have completed the configuration, click Save.