If you're encountering U102 or U103 errors during the final stage of checkout—right after entering your credit card details—this guide will walk you through the cause and the best workaround.
Example of U103 Error
Example of U102 Error
What Are U102 and U103 Errors?
These errors typically appear on the checkout screen when:
You reach the last step of payment processing.
You enter your credit card info and attempt to complete the purchase.
No transaction appears on your card history, yet an error is thrown.
These errors are not caused by your card provider or by an issue on your end—they are tied to the marketplace's payment processor’s system rejecting certain card types.
Which Cards Commonly Trigger These Errors?
Based on testing and confirmed results, these errors are commonly seen when using:
Slash virtual cards
Bill/Divvy virtual cards
Any card with high-yield rewards
These cards can fail silently—meaning you won’t even see a pending transaction, yet the checkout throws a U102 or U103 error.
Which Cards Work Without These Errors?
The following are known to work successfully even at the final checkout step:
Private Cards (issued via PrivateTabs’ virtual card system)
Personal AMEX cards
ComData cards
Why Do These Errors Happen?
Our findings show that:
Some payment processors are intolerant of high-reward cards, particularly on high-risk or restricted purchases.
They silently reject transactions at the gateway level, without a proper decline message.
This makes it seem like something went wrong locally—but it's actually the processor's end.
How to Fix It (Step-by-Step)
Step 1: Complete Checkout as Normal
Proceed through checkout and enter your billing/shipping info as you usually would.
✅ Tip: Make sure all your information is accurate.
Step 2: Enter Your Payment Details
At the final stage, input the credit card info you're using (e.g., Private Cards, AMEX, ComData)
Step 3: Watch for Errors
If you get a U102 or U103 error:
No transaction will show up on your card.
Step 4: Swap Cards
Replace the card with a Private Card (via PrivateTabs), AMEX, or ComData card.
Try the transaction again. You should now see the checkout go through without issues.
Still Seeing Errors?
Double-check your billing address matches exactly.
Use a VPN or proxy if region-locking may be in play.
Ensure your card has sufficient funds or balance.
Final Thoughts
U102 and U103 errors are frustrating—but avoidable. The solution often lies in choosing the right payment method. That’s why we highly recommend using Private Cards, which are designed to work with these processors and avoid these common rejection issues.
If you need help generating or funding your Private Cards, our team is happy to assist!
Was this article helpful?
That’s Great!
Thank you for your feedback
Sorry! We couldn't be helpful
Thank you for your feedback
Feedback sent
We appreciate your effort and will try to fix the article