Address check
Every group of four characters, compared with the address you saved.
Saved contact: Sam (sample)
- 1fq7k
- 22m9x
- 3r4ta
- 4wd8e
- 5h3nc
- 66vlp
- 7y5gu
- 80sj2
Just pasted
- fq7kgroup 1 matches
- 2m9xgroup 2 matches
- r4tagroup 3 matches
- wd8egroup 4 matches
- h3ncgroup 5 matches
- 6vlpgroup 6 matches
- y5gugroup 7 matches
- 0sj2group 8 matches
All eight groups match. If this is your first send to Sam, send a small test amount first.
Sample characters, not a real address. Fourfold Wallet (sample) shows every address this way, so you compare all of it, not only the ends.
What you see on screen
The pasted address is laid under the saved one. Each matching group gets a tick; a group that differs gets a red ring and the send button stays off.
- Read the groups aloud with the other person on the phone
- Never trust an address only because it is in your history
- Scan a code only from the person's own screen
How to compare by hand
The app does it for you, but the habit protects you in any wallet.
Find the saved address
From a contact you added yourself, not from your history or a message.
Lay them side by side
Group by group, from 1 to the last group.
Check the middle as well
Look-alikes copy the ends; the middle is where they differ.
Confirm on another channel
Ask the person on a number you already have.
Check before you send
Fourfold Wallet (sample) is free on iPhone and Android. It holds your keys on your phone and runs the four checks before every send.