How to Prepare and Post Franked Mail Correctly in 2026

Franked mail is prepared by sorting it before it leaves your office: separate UK from international, then split by service and class, bundle letters face up with the frank mark in the top right corner, and present each group in the correct pouch, tray or mailbag. You can then hand it in at a Post Office branch, delivery office or mail centre, drop it in a business post box, or book a Royal Mail collection. Franked mail no longer has to be posted on the same day it was franked, so a small backlog is not a problem.

Why presentation rules exist at all

Because there is no stamp to check, Royal Mail relies on you separating mail into the correct groups so it can go straight into the right processing stream. Sort properly and your post bypasses manual checking and weighing. Get it wrong and items are pulled aside, which is where delays and surcharges come from. Royal Mail states plainly on its official franking pages that mail must be separated by UK or international destination, then by product and class, to qualify for savings and avoid penalties.

Step one: frank the correct service onto the correct item

Weigh and measure each item rather than guessing, because a large letter franked at letter rate is the most common cause of a surcharge landing on the recipient's doormat. Franking covers 1st and 2nd Class, 1st and 2nd Class Signed For, Business Mail Advanced, Special Delivery Guaranteed, International Economy and International Standard. Royal Mail publishes a Mailmark franking prices wallchart worth pinning above the machine, and our guide to Mailmark franking machines explains why those rates differ from older meters.

The frank mark must also be legible. A faint or half printed impression can be treated as invalid, so keep a spare cartridge in the drawer. If impressions have started to look patchy, our article on a franking machine not printing properly covers the usual culprits.

Step two: sort before you leave the office

Letters

Bundle letters of the same size and class together, all facing the same way, address side up, frank mark in the top right corner, secured with an elastic band. Royal Mail supplies colour coded pouches, and the usual convention is red for 1st Class, green for 2nd Class and white for international. Pouches, trays and containers are free of charge, so ask your account contact or local delivery office if you are short.

For larger volumes, trays are easier. Stand standard letters upright with the front facing out and lay large letters flat. As a rough guide a tray holds around 340 standard letters or 80 large letters.

Parcels and packets

Parcels go into mailbags rather than pouches, again separated by class, with the correct 1st or 2nd Class tie applied. Bags have a weight limit of around 11kg, so split across more than one rather than overloading a single bag. Parcels franked using a label should have it applied flat in the top right of the largest face, with no creases or tape across the barcode. Choosing the right stock matters, as covered in our guide to franking machine labels.

Keep these items separate

Special Delivery Guaranteed should be kept apart and handed over directly rather than dropped into a pouch, because Royal Mail needs to scan and record it at handover. Burying one in a bundle of 2nd Class letters is a quick way to lose the guarantee you paid for.

One change worth knowing: since July 2025 International Tracked, International Signed and International Tracked and Signed can no longer be franked at all, because meters cannot produce the electronic customs data they require. Those services now have to go through Click and Drop.

Step three: choose where to post it

Post Office branches, delivery offices and mail centres

Any Post Office branch, Royal Mail delivery office or mail centre will accept properly presented franked mail. Larger branches often have a business counter, which is quicker than the main queue.

Business post boxes

Business post boxes are squarer in profile than a standard pillar box and are marked for franked mail, so meter users can post without queuing. There are far fewer of them than ordinary postboxes, so check what is within walking distance before relying on one.

Ordinary postboxes and the low volume outer

Loose franked items should not go into an ordinary postbox. They will be swept into the standard stream, which adds handling time. There is one recognised exception: low volume senders can use an approved meter mail outer envelope, placing their franked items inside and posting the single outer. Providers generally supply these for up to around 30 items, one outer per day. Confirm current limits with your own provider.

Royal Mail collections

Royal Mail can collect from your premises, as a one off or on a scheduled basis. Collections are chargeable and terms depend on your account and annual spend, so speak to Royal Mail directly for current pricing.

The seven day rule: franked mail does not have to go the same day

This is the change most mailrooms have not caught up with. For years the rule was strict: franked mail had to be posted on the date printed in the frank mark, which is why so many machines have an advance date function. Royal Mail has since relaxed it, and franked mail can now be posted up to seven days after the day the impression was printed.

So a Friday run that misses the last collection is no longer wasted. It does not mean you should stockpile, though: postage rates change, most recently in the April 2026 Royal Mail price update, and mail franked at an old rate will be short paid afterwards. Frank a few days ahead, not a few weeks.

Common mistakes that trigger delays and surcharges

• Mixing 1st and 2nd Class in the same bundle or pouch.
• Leaving international items in with UK mail.
• Franking a large letter or parcel at standard letter rate.
• A faint impression caused by a dying ink cartridge.
• Frank marks placed too low or too far left rather than in the top right corner.
• Thick or textured envelopes the machine cannot print cleanly on. Smooth self seal business envelopes feed far more reliably.
• Applying a label over a seam or tape line so the barcode cannot be read.

The routine that avoids all of these is simple: weigh, frank, bundle, sort, present. Keep one pouch per class on the bench, and a spare cartridge and pack of franking labels in the drawer.

Frequently Asked Questions

Can franked mail be posted the next day?

Yes. Royal Mail allows franked mail to be posted up to seven days after the day the meter impression was printed, so an item franked on a Friday can go out the following Monday. The old requirement to post on the exact date shown in the frank mark no longer applies, although you should avoid franking so far ahead that a price change catches you out.

Can I put franked mail in a normal postbox?

Loose franked items should not go into an ordinary postbox, because they will be handled as standard mail and may be delayed. The recognised exception is an approved meter mail outer envelope from your provider, which allows a small daily volume, generally up to about 30 items, inside a single outer, limited to one per day. For anything more, use a business post box, a Post Office branch, or book a collection.

Where do I get Royal Mail mail pouches and trays?

Royal Mail provides pouches, trays and mailbags free of charge to franking customers. Ask your account contact, your collection driver, or your local delivery office. You do not need to buy them.

Do I have to separate 1st and 2nd Class franked mail?

Yes. Separating by class, and by UK against international destination, is a Royal Mail requirement rather than a courtesy. Mixed bundles have to be checked manually, which slows your mail and can lead to penalties.

What happens if the frank mark is smudged or unreadable?

An illegible impression may be treated as unpaid, which usually means the item is delayed and the recipient is asked to pay a surcharge. Replace the cartridge as soon as print quality drops, run a cleaning cycle if your machine offers one, and use a label on any envelope the machine cannot print on cleanly.

Does franked mail need a certificate of posting?

Not for ordinary 1st and 2nd Class franked mail. For Special Delivery Guaranteed, hand the items over at a counter or to your collection driver so they are scanned and recorded.

Getting the small things right

Most franking problems are presentation problems rather than machine problems: a mixed bundle, a faded impression, a label on the wrong face. Our franking machine labels and ink cartridges cover the Pitney Bowes, Quadient, Neopost, FP Mailing and Frama ranges, and the team can identify the right item for your model via our contact page.