Configure checkout experience

Adjust how your popup checkout behaves and what customers see during the purchase flow. You can control the cart display, localization, subscription settings, and completion page layout.

In the FastSpring app, go to Checkouts > Popup Checkouts, then click Settings on the checkout you want to edit. Use the Checkout tab to configure the options below.

Checkout experience

Cart, email, localization, accessibility

Purchaser settings

Billing contact and gift purchases

Promotion

Coupon field and expand behavior

Customer information

Newsletter, address, phone, renewal options

Completion page

Window size, product, and license display

Caching

Browser caching for faster checkout load

Checkout experience

Control the primary flow and accessibility of your popup checkout.

Setting	Description	Available options
Show Shopping Cart	Displays a cart button that allows customers to view and modify their order contents.	Checkbox (Enable)
Use Responsive Cart	Allows the cart view to automatically adapt to the device size. Only applies when Show Shopping Cart is enabled. Note: The Use Responsive Cart option is unavailable for the Dark theme checkout.	Checkbox (Enable)
Require Email to Start the Order	Requires customers to enter their email before continuing with checkout.	Checkbox (Enable)
Country and Language Selector	Controls whether customers can view or modify the localized language and country settings.	Enable Enable, but lock Disable
Subscription Terms Display	Determines how subscription terms appear within the checkout title area.	Display subscription terms behind "View Details" link Expose subscription terms directly on checkout
Tax Exemption	Displays a link for customers to enter a tax exemption ID, removing applicable taxes.	Checkbox (Enable)
Open Footer Links in Overlays	Opens Privacy Policy and Terms of Sale links in overlays rather than a new browser window. Recommended for in-app checkouts.	Checkbox (Enable)
Provide a visual cue of focus point on checkout entry	Adds a border around the topmost interactive element to improve accessibility for visually impaired users.	Checkbox (Enable)
Allow Customers to Generate Quotes	Allows customers to create a self-service quote directly from checkout.	Checkbox (Enable)

Purchaser settings

Control who receives the billing and fulfillment details for orders.

Setting	Description	Available options
Allow Separate Billing Contact	Allows the billing information to differ from the fulfillment contact. Not applicable when gift purchases are enabled.	Checkbox (Enable)
Allow Gift Purchases	Allows customers to purchase products for someone else. Gift purchases do not support subscriptions.	Checkbox (Enable)

Promotion

Enable or configure the promotional code field for discounts.

Setting	Description	Available options
'Promotional Code' Field	Displays a field for customers to enter valid coupon codes. If disabled, codes can still be passed through the API.	Checkbox (Enable)
Automatically Expand 'Promotional Code'	Determines how the promotional field appears at checkout.	Yes – Field appears by default No – Field appears after customers click the link

Customer information

Choose which customer details to collect at checkout.

Setting	Description	Available options
Display Newsletter Subscription Checkbox	Shows a “Get free updates” opt-in checkbox below the email field. Sends mailing list webhooks when selected.	Yes, Checked Yes, Unchecked No
'Company' Field	Displays a company name field at checkout.	Disable Enable Enable and make it required
Collect Physical Address	Specifies whether to collect a billing address during checkout.	Enable and optional Enable and required Disable
Collect Phone Number	Requires customers to enter their phone number before purchase.	Checkbox (Yes)
Save Payment Method for Auto Subscription Renewals and Future Purchases	Controls how payment details are saved for recurring billing or future one-time purchases.	Do not allow subscription customers to opt out from saving payment details Allow, Opt-Out – Saved by default; customers can opt out Allow, Opt-In – Not saved by default; customers can opt in

Completion page

Control what appears on the confirmation page after successful checkout.

Setting	Description	Available options
Flexible Popup Window Size	Automatically adjusts the checkout window size to fit product details and post-order content.	Checkbox (Adjust popup window size based on contents)
Display Products on Completion Page	Displays purchased product details on the completion page.	Checkbox (Enable)
Display Licenses on Completion Page	Displays purchased licenses on the completion page.	Checkbox (Enable)

Caching

Enable browser caching to speed up checkout rendering by storing temporary data locally.

Setting	Description	Available options
Allow Browser Caching	Caches builder API data for up to 10 minutes to improve load speed. Avoid enabling if you frequently update catalog prices.	Checkbox (Enable)

Note: Cached data may delay updated pricing or product changes by up to 10 minutes.