Martin Lewis is urging everyone who sends letters or parcels using Royal Mail that they need to act fast - within the next four days - to beat a price rise that's set to take effect.
The money expert explained how people can stockpile stamps in the next few days because the price of first and second class stamps is going to rise sharply from April 3.
But due to the fact that stamps stay valid no matter what price you paid for them, if you stock up now, you can get in before prices rise and continue sending letters at the old rates.
