PayPal Checkout Method
PayPal is fucking everywhere. Every major retailer every dinky little
Shopify store theyre all waving that blue and yellow buttons in your face. But most
carders treat
PayPal checkouts like
kryptonite and for good reason. Those clever bastards at
PayPal have been beefing up their
anti-fraud systems year after year making it a goddamn
nightmare to get through their checkouts.
View attachment 49759
But heres where it gets interesting - Ive been sitting on a
method thats been consistently hitting
PayPal checkouts for the past two years. This is a fundamental
design flaw in their system that they cant just patch away with a quick update. And today Im going to break it down for you step by bloody step.
Disclaimer: The information provided in this writeup and all my writeups and guides are intended for educational purposes only. It is a study of how fraud operates and is not intended to promote, endorse, or facilitate any illegal activities. I cannot be held liable for any actions taken based on this material or any material posted by my account. Please use this information responsibly and do not engage in any criminal activities.
PayPal Checkout Flow
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Before we dive into the
exploit lets break down how
PayPals checkout flow actually works. There are two main paths a transaction can take:
PayPal Express Checkout (Immediate Payment)
- Customer hits 'Pay with PayPal' button
- Gets redirected to PayPal for payment
- Payment processes immediately on PayPals end
- Customer returns to store with completed transaction
- No additional confirmation needed
- Common on basic ecommerce sites
PayPal Standard Checkout (Two-Step Process)
- Customer hits 'Pay with PayPal' button
- Gets redirected to PayPal to authorize (but not process) payment
- Returns to merchant site with PayPal token
- Can still modify shipping/billing details
- Must hit final 'Pay Now' button to complete
- Used by larger retailers for flexibility
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This second flow - the
Standard Checkout - is where our vulnerability lies. That gap between authorization and final processing? Thats our
golden ticket. The two-step process creates a window of opportunity that
PayPals fraud detection cant easily close without breaking legitimate functionality.
PayPals Fraud Detection
PayPals fraud detection is a multi-layered beast thats been fine-tuned over decades of fighting
fraudsters. At its core its built around one critical insight -
shipping addresses dont lie. While most payment processors obsess over browser fingerprints and IP
PayPal knows that physical orders leave a paper trail you cant fake. Theyve built an extensive database of
trusted delivery locations tied to every
PayPal account and card thats ever touched their system.
Think about it - that $5
shit card youre trying to use? Chances are its legitimate owner has ordered something through
PayPal at some point in their life.
PayPal already knows their home address their work address their moms house where they ship Christmas presents. Every successful transaction leaves a footprint in
PayPals massive web of
trusted locations. When you try to ship that 65-inch TV to some random address theyve never seen before
alarm bells start ringing.
This obsession with shipping addresses extends beyond just individual transaction history.
PayPals algorithms analyze delivery locations across their entire network building heat maps of legitimate commerce versus
suspicious activity. They know which zip codes have
high fraud rates which addresses are associated with
drops even which buildings tend to see unusual shipping patterns. Your seemingly innocent order gets run through this long list of location-based risk factors before it ever hits the payment processing stage.
But what makes
PayPals fraud detection truly formidable is how it combines this shipping intelligence with their massive user data set. Nearly every adult in the
US has interacted with
PayPal at some point - whether through direct purchases receiving payments or just creating an account they never used. Each of these interactions feeds into their risk models creating an intricate web of
trusted relationships and verified behaviors thats nearly impossible to penetrate with traditional
carding techniques.
Why Bill=Ship Trick Doesn't Work
Good luck. Unlike regular credit card transactions most sites wont let you change jack shit once a
PayPal payment goes through. And theres a damn good reason for that -
PayPal is basically their
fraud-free guarantee.
Think about it: When you pay with a credit card sites put you through a
fraud checks upon fraud checks and all sorts of verification bullshit. But pay with
PayPal? That shit gets packed and shipped next day no questions asked. Why? Because these merchants know
PayPals fraud detection is
god-tier. Theyve seen
PayPals track record of shutting down
fraudsters and they trust it more than their own mothers.
The merchants logic is simple: Nobodys stupid enough to try
carding through
PayPal. The risk models are too sophisticated and the data set is too massive. So when they see a
PayPal payment come through they treat it like its blessed by the fraud prevention gods themselves as long as no info is changed after payment.
The Shipping Address Switcharoo
Heres where shit gets interesting. Remember that two-step
PayPal Standard Checkout flow we talked about? That gap between authorization and final processing isnt just a quirk - its our fucking hammer. To better get the point across lets illustrate it with a random
Shopify store.
View attachment 49771
When youre dealing with a
Shopify store using
PayPal Standard Checkout heres how were gonna fuck with their system:
- Add your shit to cart and proceed to checkout
- At shipping info enter the CARDHOLDERS REAL ADDRESS
- This is crucial - PayPal needs to see an address they trust
- Make sure it matches what PayPal has on records for the card
- Click 'Next' and on the payment page hit that 'Pay with PayPal' button
- PayPal sees a trusted shipping address
- Their fraud detection gets a warm fuzzy feeling
- Authorization goes through clean as a whistle
- Heres where the magic happens:
- After PayPal authorization but BEFORE final confirmation
- Shopify will let you 'review' (unless the store uses Express Checkout in which case it will proceed with the transaction instantly) your order one last time
- This is when you switch that shipping address to your drop
- PayPals already given their blessing they aint checking again
- Smash that final 'Pay Now' button
- Transaction processes through PayPals pre-authorized token
- Shopify gets your updated shipping info
- Package heads to your drop instead of the cardholder
How and Why This Works Like A Charm
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Final Thoughts
So there you have it - the holy grail carding
PayPal checkout laid bare. Were not just throwing shit at the wall here and hoping something sticks. This is calculated precise exploitation of a fundamental flaw in their checkout flow.
Remember though - this aint some 'get rich quick' bullshit.
PayPals fraud detection is still a
beast.
And for fucks sake keep your
OPSEC tight. Mix up your
drops vary your purchase amounts and never reuse the same
PayPal account twice.
Class dismissed. Now go make that money - just dont come crying to me when you fuck it up by cutting corners.
d0ctrine out.
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