The following are some handy shortcuts to know when configuring links to things like thank-you messages. 

Putting this code: ?tmpl=component  at the end of the link to a Thank-You message strips out the rest of the page from the link (the FastGem menu bar, etc.) and makes the page display only the simple text of the thank-you message.

The question mark signals that you’re adding some additional instructions to the link. If the link already has a question mark in it, and you want to add something else like tmpl=component to it as well, use an ampersand (&) instead of a question mark to signal that you're adding additional instructions.