Built for Craigslist sellers & buyers

Bring trust to anonymous Craigslist deals.

Craigslist has no profiles, no ratings, no protections. Authryn fixes that — both parties verify their real phone numbers and sign one tamper-proof receipt before money changes hands.

Create your first receipt — freeVerify a receipt
No credit cardSet up in 30 secondsNo app to download

The trust problem on Craigslist

You've probably been here before — or worried about it happening.

Zero accountability

No profiles, no reviews, no recourse. If they ghost or scam, you've got nothing — just an email address.

Cash deal, no proof

Cash means no Venmo/Zelle paper trail. Whose word do you believe when the buyer says the item was broken?

Meeting strangers

You meet in a parking lot. Hand over a $400 laptop. Get the cash. A week later they claim it never happened.

How it works

3 steps. 30 seconds. Tamper-proof.

1

Create the receipt

Type what you're selling on Craigslist and the price. We generate a unique link.

2

Share & both verify by phone

Send the link via Messenger, SMS, or QR code. Both parties verify their real phone number.

3

Done. You're both covered.

The receipt is now cryptographically signed evidence. Nobody can claim the deal didn't happen.

Perfect for any Craigslist deal

Apartment sublets
Used cars
Furniture
Computers & electronics
Musical instruments
Bikes
Power equipment
Anything cash
“Bought a used MacBook on Craigslist. We met up, both did the Authryn verify on our phones in 30 seconds, I handed him cash, signed the receipt. If anything had been wrong with the laptop, I'd have evidence of exactly what we agreed to. Worth $1.”
Anonymous buyer
Craigslist, Brooklyn NY

Frequently asked

Do we both need to be tech-savvy?
Not at all. The whole flow is: click link → enter phone → enter code → tap sign. About 30 seconds total. If you can text, you can use Authryn.
Can we do this for cash deals?
Especially for cash deals. The receipt captures the description, amount, and both phone-verified signatures. It's the only paper trail for transactions that have no Venmo/Zelle.
What if I'm meeting in person?
Even better — both pull out your phones, scan one QR code, both verify in real time. Takes less time than counting cash.
Is my phone number safe?
Only the last 4 digits ever appear on the receipt. We never share, sell, or call your number. We use it solely to confirm you're a real human at a real number.
How much does it cost?
Your first receipt is free. Additional receipts are $1 each, or $0.50 if you buy a 10-pack.

Ready to sell on Craigslist without fear?

Your first receipt is free. No card, no commitment, no app. Just trust — built in 30 seconds.

Get my free receipt