Bitcoin Forum

just wanna ask how to check sign message is legit.
seen lending threads asking sign message but how do they know its true?

Shorena created a useful tutorial on creating and verifying signatures here (https://bitcointalk.org/index.php?topic=990345.0#post_verify).
If you would like to use a non-web service, there is the 'Verify Message' option under 'File' in Bitcoin Core, A 'Verify' option in Electrum on the 'Sign/Verify message' option under 'Tools' and a 'Verify Message' option under 'Tools' in MultiBit.

   you can do that from your wallet ( Electrum, Bitcoin core, etc....)

or you can check this with an easy online tool , ie: http://coinig.com/ (http://coinig.com/)   8)

Better just download a wallet, like the ones mentioned. Using an online tool would mean that you're putting your trust on the party operating it to sign your messages.

read this
https://support.cex.io/hc/en-us/articles/203087316--Guide-How-to-do-a-Bitcoin-signature-to-verify-address-ownership

you're right alani123 : indeed, to sign a message  the better solution is a desktop wallet .. but, in this case , it seem the OP just search a way to "verify" a signed message ..  :)

I would not recommend anyone to use coinig because they are prone to errors and can't verify messages properly. also they can't verify any signed messages with multiple lines
like
this.