Corrections

How to report a mistake

Write to hello@customersprofit.com with the page, the passage and what is wrong with it. If you have a source, include the link.

What we do next

We check the report against primary sources, correct the text and record the correction on this page with a date and description. Significant errors are also noted in the guide itself.

Corrections and updates log

There have been no corrections of factual errors since launch on 31 October 2026.

31 October 2026: all 14 guides were revised to be clearer. Texts were shortened and illustrative situations, charts, step-by-step instructions and callouts were added; some guides gained additional sources. Conclusions did not change, and every new number was recalculated and recorded in the claims register.