Double Your Money Back If This Doesn't Work. No Questions Asked. No Fine Print. Just Return It.
From: Gary Halbert / Classic guarantee formula
RMBC Breakdown
Why this copy works — broken down by Research, Mechanism, Brief, and Copy layer.
R — Research
Research insight: Halbert's testing revealed that 'double your money back' outperformed standard money-back guarantees by 2-3x in conversion, while actual refund rates increased by less than 10%. The math is counterintuitive: a bolder guarantee generates far more incremental sales than it costs in additional refunds. The buyer interprets the bold guarantee as extreme confidence in the product.