Martin Lewis' MoneySavingExpert team is urging people to stock up on stamps before their cost goes up from next week.
The consumer experts say the cost increase can be avoided by bulk buying at the standard rate. They are reminding people that from Monday, April 3, the cost of first-class stamps will rise from 95p up to £1.10 - making them 15p more expensive.
Meanwhile second-class stamps will increase from 68p up to 75p - meaning a 7p increase. However, people are being asked to make sure they buy stamps with barcodes on, reports the Liverpool Echo.