Message signing is simply proving ownership of your crypto address.
Please note that the signing option is not available for all types of wallets.
If you use Ledger, Trezor or Bitbox02, the process has been automatized and integrated to the placing order menu, simply choose the one you are using.
How to sign a Bitcoin message using Electrum on PC ( https://electrum.org/ ) :
→ After filling the requested fields (your IBAN, full name and BTC address) you will get the message to sign:
→ Click on "Copy message" and open your Electrum wallet
→ From the main menu, select Tools -> Sign/verify message. Paste the message previously copied, in the field Message and add your BTC address in the field Address ( please note that the address you're signing has to be already added into your Electrum addresses list )
You can now click on Sign and you will get your Signature:
→ Copy the Signature and paste it in your Bity order and click on "Continue"
That's it, your order can now be finalized!
We also suggest using the below wallet applications and checking out their individual tutorial pages to learn more:
Trezor - View signing guide here.
Ledger - View signing guide here.
Bitbox - View signing guide here.
MyCrypto - View signing guide here.
If you have any questions or issues during the signing process, you can contact our support by clicking on the blue chat bubble at the bottom right-hand corner of your screen when visiting our platform.