Each template will have its own requirements so I can't give you such a statement without knowing the exact template and what site it may have come from. Most of them will give their usage terms in the body of the template to serve as dummy text.

Most of the ones I use, as well as any I've distrubuted require the original copyright link and text to remain unchanged. It says soemthing like "template provided by soandso" with soandso being a link to a personal website or the user account on a template site.