There is in this one, too.

"The courts use Veritaserum, but it's a joke really, you just Obliviate yourself before you testify and then claim the other person was Memory-Charmed with a false memory. If you've got a Pensieve, and we do, you can even get the memory back afterward. Now, ordinarily the courts presume in favor of Obliviation having occurred rather than more complicated Memory Charms. [...]"