Many Hypnosis sites guarantee that you’ll be completely satisfied with their Hypnosis CDs or MP3s, or you can request your money back, no questions asked.
Sites which offer guaranteed Hypnosis sessions include:
Hypnosis Network - 365 day money back
Hypnobusters - 90 day money back
Hypnosis Downloads - 90 day money back
Mind Motivations - 90 day money back
Instant Hypnosis [...]