How to Enable Card Auth on Sparkforge SaaS Checkout Pages

By Sparkforge Support Team ·Last reviewed May 3, 2026

Open the funnel step containing your SaaS product, go to the Products tab, and enable card authorization. The card is validated for sufficient funds, then the payment intent is refunded immediately so the buyer is not charged.

If you run SaaS Mode on Sparkforge, free trials and low-friction signups also attract bad actors. Card authorization weeds them out by validating the card before creating a subscription, without actually charging real customers.

Identify Your Funnel Version

Card auth steps are slightly different between Version 1 and Version 2 funnels.

  1. Go to Sites > Funnels in the location view.
  2. Look for the v2 tag next to the funnel name. V2 funnels are tagged; V1 funnels have no tag.

Card Auth on V1 Funnels

  1. Open the funnel step that contains your SaaS product.
  2. Open the Products tab.
  3. Enable card authorization.

Card Auth on V2 Funnels

  1. Open the funnel step that contains your SaaS product.
  2. Open the Products tab.
  3. Enable card authorization.

How Card Authorization Works

Card auth creates a payment intent on the buyer's card to validate that it is real and has sufficient balance, then refunds the intent immediately before the charge settles. It is especially useful when you offer a free trial — only buyers with valid cards proceed.

Will My Clients Get Charged?

No. The payment intent is refunded before the charge settles. Card auth is purely a verification step; nothing posts to the cardholder's statement.

Frequently Asked Questions

Why enable card auth on a free trial?
It blocks signups from bad actors using fake or invalid cards while letting real users with valid cards proceed without being charged.
Does card authorization charge the customer?
No. The payment intent is refunded immediately before the charge can settle, so nothing posts to the cardholder's statement.
Where do I enable card auth?
Inside the funnel step that holds your SaaS product, under the Products tab. Both V1 and V2 funnels support it.
How do I tell which funnel version I have?
Go to Sites > Funnels. V2 funnels show a v2 tag next to the name. Untagged funnels are V1.

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