Can I remove %%Your Signature%% from the displayed message

In the petition message, at the bottom it includes “%%Your Signature%%” to indicate that it is a placeholder for the person’s signature at the bottom of the message sent to the target.

If you want to hide that in the message on your site, you can do so using CSS. Go to dashboard > appearance > customise > additional CSS and add the following at the bottom:

.dk-speakout-caps{
display:none;
}