This stands for British Forces Post Office. Whistl can process mail destined for the BFPO via our AllSort product.



This stands for Customer Bar Coding, and gives the Royal Mail machines the exact information they need to sort the items for delivery.


Consumables are containers that our customers use to hand over their mail to us, such as magnums, bags and trays.



Since the market de-regulated in 2004, Whistl has been able to carry mail on behalf of organisations in competition with Royal Mail but may need to use their postmen to deliver mail. This process is known as Down Stream Access.

Doordrop media

Intelligent doordrop is available in a range of versatile, impactful formats that literally help your message hit home. For more information visit idoordrop.com


This stands for Direct Marketing, a specific targeted marketing method including Direct Mail and door drops.


This is the name for the place where we sort and process our customer’s mail. We have 7 depots throughout the UK.



This online tool allows customers to declare their daily mail volumes for each of Whistl’s unsorted services, as well as enabling them to create a unique tray card, which should accompany every mailing.


Final Mile

This is the term used to describe the final part of the journey that mail takes, where postmen go out on their rounds and deliver mail to the homes of the end consumer.


Hybrid Mail

Hybrid Mail is a process by which mail is submitted electronically, via a PC, and then printed and posted by Whistl. It allows you to send your mail from desktop to doormat, without the need to fulfil and print.



An indicia is the mark in the top right hand corner of an envelope which determines who has handled and processed the mail.


This stands for Inward Mail Centre, and refers to the Royal Mail centres that Whistl deliver mail in to, in order for them to then deliver the mail the ‘final mile’ with their network of postmen.


Large letter

This is the term used to describe a letter of certain dimensions. Large letters are typically A4 size, and weigh less than 750g. For exact letter specifications, please refer to our Customer Guides.



A magnum is a large container used to store and transport mail between our customers and depots. One magnum can carry bags and trays filled with letters.


This refers to mail that can be processed by our sorting machines. It will need to be clearly addressed, and of a certain format and weight.



Non-machineable items are those that cannot be processed through our machines, due to the fact the address is not readable or is handwritten, or the items are not the correct weights and dimensions.



Using Optical Character Recognition (OCR) enables our customers to print addresses in a typeface that our sorting machines are able to read.


OFCOM are the government-approved regulatory authority for the postal industry in the United Kingdom. On 1st October 2011, OFCOM took over responsibility for regulating postal services from POSTCOMM.



This refers to mail ítems that have already been sorted by the business customer by the time we collect them. Mail can be sorted to a number of different specifications, details of which can be found in our Premier customer guide.


We ask all of our customers to provide us with a pre-notification file so we know the details of any presorted mail that we are collecting from them.


Sort Software

This refers to the sort database that we have developed for our customers which allows them to sort their mailings more easily before presenting them to us.


Tray card

A tray card is placed on every tray presented to us and contains important information about that mail which allows us to process it correctly.



Unsorted refers to any mail that has not been sorted by the customer, and needs to be processed through our machines in order to sort it correctly ready for delivery.


This stands for Universal Service Obligation. Royal Mail has an obligation to deliver mail to every UK address every working day aside from a small number of exceptions to the delivery universal service obligation.

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