It has also listed a number of known scams on its website so customers can check messages they are unsure of.
Above these, the website states: “These are some typical examples of scams that look like they’re sent by Royal Mail, but are in fact fraud or phishing scams.
“Please don’t click on any of the links in these emails and be vigilant if you receive a communication which you aren’t sure about.”
Royal Mail also encouraged customers to report any scams they are targeted by.
The website continues: “If you receive a suspicious email, text message, telephone call or discover a Royal Mail branded website which you think is fraudulent, please report it to [email protected]