Use the Sign Message feature from your Multiflex wallet to verify ownership of a wallet address that belongs to you.
Enter the following data into the wallet software:
Address: mflex1q9k75judrmx22dumf5k0uw8krjpk3c8p5zdn7h2
Message: <display name from the form below>
Click the Sign Message button in the wallet, and copy/paste the resulting Signature at the bottom of this form.
Finally, click the Claim button below to claim your address, which will display your custom display name instead of the default wallet address on this site.
NOTE: You can update your claimed address at any time, as often as you wish. To remove a previously claimed display name, simply sign a blank message to return the address back to its original value.