Latest / The Copywriting Podcast with Fexingo: Sales Letters, Headlines, and Persuasive Writing
How a Handwritten Underline Boosted Response by 37 Percent
In this episode, Lucas and Luna dive into a forgotten copywriting technique from the early 2000s: the handwritten underline. They examine a split test from a direct mail campaign for a B2B software company, where a simple red pen underline under a key benefit increased response by 37 percent. They discuss why the tactic worked—simulated annotation, implied endorsement, and the psychology of 'this is important'—and how digital marketers can adapt it today with underlining, highlighting, or marginalia in emails and landing pages. The episode also touches on the broader lesson…
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