How to make a complaint

At Whistl the security and quality of mail delivery is of paramount importance to us. We continually aim to achieve the highest levels of service and customer care. If you are not happy with how we have delivered your mail then please follow our guide below.


Step 1: Making A Complaint

You can make a complaint about a delivery issue in the following ways:

By Post: Attn: Customer Services, Whistl UK Ltd, Meridian House, Fieldhouse Lane, Marlow, Buckinghamshire, SL7 1TB

By Telephone: 01628 891 644

By Email:


Complaints should be submitted within 30 days of the incident date.

Whistl aims to investigate and resolve all complaints within 28 days of the date the complaint was submitted.


Step 2: Escalating Your Complaint

Escalation - Stage 1 If you are not happy with how your complaint has been handled, please contact the Customer Services Manager within 14 days for your concerns to be escalated and reinvestigated.


Escalation - Stage 2 If you remain unhappy with the results of your complaint you must contact us within 14 days of a reply to your earlier escalation, where your issue will be reinvestigated by the Head of Customer Services.

Whether you’re new to Whistl, one of our customers or just want to ask some questions we’d love to chat!
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