3DS Card Authentication for Sparkforge Affiliate Signup

By Sparkforge Support Team ·Last reviewed May 3, 2026

Some banks require 3D Secure (3DS) verification before charging a card. Use the dedicated 3DS-supported affiliate signup link so the OTP step is triggered correctly.

Some banks — common with cards issued in India — require 3D Secure (3DS) authentication before approving an online charge. If your affiliate trial signup fails at the payment step, use the 3DS-supported flow below.

Use the 3DS-supported signup link

Open https://affiliates.sparkforge.com.
Start the trial signup and enter your card details.
If prompted, complete your bank's 3DS or OTP authentication.

This flow is built to trigger 3DS when required and validate the card securely.

What you should see

A bank authentication step (OTP or in-app approval) if the card requires 3DS.
Signup completes after you approve the authentication.

About the $1 authorization

To trigger 3DS and confirm the card is valid, the signup may place a $1 authorization on it.

This is not a plan or subscription charge.
It appears as a temporary pending hold.
It drops off based on your bank's processing time.

If authentication still fails

Try again in an up-to-date browser.
Disable ad blockers on the signup page.
Allow pop-ups and redirects so the bank's authentication page can load.
Try a different card if your bank declines verification.

The same 3DS-supported experience is being added to the main signup flow. Until then, use the link above for any 3DS-related failures.

Frequently Asked Questions

Why does my card need 3DS verification?

Many banks — especially issuers in India and parts of Europe — require 3D Secure to confirm online charges. It's a fraud-prevention step, not a Sparkforge requirement.

Will the $1 authorization be charged to my card?

No. It's a temporary authorization to verify the card. Your bank releases it on its normal processing schedule.

What if my bank declines the OTP?

Try a different card, or contact your bank to confirm international or online transactions are allowed.

Does the 3DS link work for non-affiliate signups?

The link in this article is specific to the affiliate signup flow. The main signup is being updated to the same 3DS experience.