Not being covered legally
One mistake that copywriters might make is, use controversial material and
not be covered legally to take on a public litigation. Some of the words that
should not be used or used sparingly include – no risk, guaranteed results,
100% money back etc.
If these are true, then they can be added sparingly and not made the
headlines. And if these are not true, then you can add them and add in a
disclaimer to either tell the truth or that certain conditions apply.