Which Franking Mistakes Lead to Royal Mail Surcharges?

The franking mistakes most likely to trigger a Royal Mail surcharge are underpaying postage, franking a large letter at letter rate, mixing first and second class mail, underpaying international items, and faint or incomplete franking impressions. When mail is underpaid or franked incorrectly, Royal Mail charges the shortfall plus an administration fee – and there is no minimum underpayment threshold, so even a penny short can be picked up.

Measuring errors (size and weight)

A franking machine weighs your item, but it cannot check its size or thickness. If you frank a large letter at standard letter rate, or misuse the size guide, Royal Mail will charge you the difference plus any administration fee. Always check the format against a Royal Mail size guide before you frank.

Mixing mail classes

If a second class item ends up in a first class posting, it is treated as first class – and you are charged the difference between the two rates plus an admin fee. Keep your classes clearly separated when you bag your mail.

International items

It is easy to frank an item bound for overseas at a UK rate by mistake. International items franked below the correct price will attract a surcharge, so double-check the destination before franking.

Faint or incomplete impressions

If the franking impression is smudged, faint or incomplete, your mail can be delayed, withheld or surcharged. Keeping your machine serviced and using Royal Mail-approved ink means every impression prints cleanly and is accepted first time.

How Royal Mail treats incorrectly franked mail

Royal Mail processes millions of items a day, so underpaid mail is usually still delivered – but the shortfall is recovered, plus an administration charge. Because there is no underpayment threshold, accuracy matters on every item.

FAQs

What is the most common franking mistake that leads to a surcharge? Mis-measuring an item – usually franking a large letter at standard letter rate – is one of the most common causes, because the machine checks weight but not size.

Is there a minimum underpayment before Royal Mail charges you? No. There is no underpayment threshold, so even being a penny short can result in a charge plus an administration fee.

How do I avoid franking surcharges? Measure size as well as weight, keep mail classes separate, check international destinations, and keep your machine serviced with approved ink so impressions print clearly.

A Mailmark franking machine helps you frank accurately and at the lowest available rates. See our Mailmark franking machines or call 01543 572 776. Mailcoms is a Royal Mail Authorised Independent Inspector & Maintainer of postal franking machines (since 2008).