The encyclopedia
Dark Pattern

The One-Way Door

The effect

"Easy to start, hard to leave."

The method

Sign-up is one click; cancellation is buried, requires a phone call, or asks confirmation five times. The friction asymmetry is the manipulation.

Black hat
9/10
Most common usage on the angel→devil scale
The ethics spectrum

Same hack. Three very different choices.

White hat

Cancellation is as easy as sign-up. Often a single button.

Grey hat

Cancellation requires logging in and clicking through one extra screen.

Black hat

Cancellation by phone only, during business hours, with retention scripts.

The template

A formula you can steal

Audit [STEPS TO START] vs [STEPS TO LEAVE] → make them symmetrical.
Spotted in the wild

Where you've already seen this

  • The FTC's 'Click-to-Cancel' rule, written specifically because of this trick.
  • Major newspapers requiring phone calls to cancel digital subs.
  • Gym memberships requiring certified mail with 30 days notice.
When to use it

Never as a retention strategy. The only legitimate use is making destructive actions (delete account, wipe data) require a confirmation step.

When NOT to use it

On reversible actions (cancel, downgrade, pause). The litigation and regulatory exposure now outweighs any retention math.

The 5-minute practice

Try the trick today

Time yourself signing up for your own product. Time yourself cancelling. If cancel takes more than 1.5× sign-up, you have a problem.

Don't get hacked
Want to avoid this trick being run on you? Take the AI Marketing Course →

Free Marketing Hacked module included. See more cautionary tales and learn the playbook from the inside.

See it in action

1 teardown use this trick