This can be effective, he said, because it doesn’t flag an urgent or unlikely issue: it just says there’s a small admin error, and “uses polite, neutral wording. Nothing feels alarming, which is why people click without thinking”.
Article source: https://www.huffingtonpost.co.uk/entry/how-to-spot-scam-royal-mail-text_uk_695e310ae4b06463f5407206