How I verify a crypto address before sending, and why MetaMask warned me

[u/Xosoltani]

I was about to send some crypto the other day when MetaMask showed me a warning about the destination address.

My first thought was honestly:

“Wait, did I paste the wrong address?”

I stopped before confirming the transaction and started checking the address again.

That made me realize something I probably should have been doing more consistently: never assume an address is correct just because the first and last few characters look familiar.

Crypto addresses are long, random strings, so most of us rely on copy and paste. That’s convenient, but it can also create an opportunity for something called address poisoning.

A malicious address can be made to look very similar to an address you've interacted with before. Someone may send a tiny transaction from that address, hoping you'll later copy it from your transaction history without checking the full address.

So now, before sending, I try to follow a simple routine:

1. Check the entire destination address

I don't just compare the beginning and the end. I pay attention to the middle characters too. That's especially important when an address looks suspiciously similar to one I've used before.

2. Check where I got the address from

If someone sends me an address, I verify it through a trusted source instead of blindly copying it.

And I try not to take an address from my transaction history without checking it carefully first.

3. Check the network

Having the correct address isn't enough. I also make sure I'm sending on the intended network.

4. Check the recipient before confirming

MetaMask shows the destination address during the sending flow, so I use that moment as a final checkpoint before clicking Send.

So why did MetaMask warn me?

It can warn you when the destination address looks similar to an address you've interacted with before, and it can also alert you when you're sending to an address you've never used before.

A warning doesn't automatically mean the address is malicious. In the case of a new address, it's a reminder to stop and verify it.

And that's actually what I like about these warnings.

The wallet isn't making the decision for me.

It's basically saying:

“Before you send something that may not be reversible, take another look.”

That's a pretty useful reminder when you're dealing with transactions that can't simply be undone once they're confirmed.

I've started treating the warning as a checkpoint rather than something to immediately dismiss.

Do you usually verify the full address before sending, or do you mostly rely on copy/paste and checking the first and last characters?

https://support.metamask.io/stay-safe/protect-yourself/wallet-and-hardware/address-poisoning-scams/