“Phone numbers can be easily spoofed by criminals — don’t trust a number just because it appears to come from a genuine organisation.
“Never click on links sent via email or SMS text message.”
Royal Mail also has tips on its website for those who are unsure whether a message is real or not.
It states: “Scam mail can take the form of fake lotteries and prize draws, get-rich-quick schemes, bogus health cures, investment scams and pyramid schemes.
“Sometimes these can be sent to you if a scammer has got hold of your contact details fraudulently.