The Attribution gadget is the gadget in the footer that says "Powered By Blogger". If you have tried to remove this then you may of noticed this gadget is locked into you blog. To unlock it, follow the next steps:
Step 1: Log in to your Dashboard, go to Template > Edit HTML
Step 2: Search for Attribution
Change the true value to false and save it.
Step 3: Go to layout and remove your Attribution Gedget
Have fun!