Complaint
Send a complaint letter
Send a complaint letter online when you need a formal paper trail. Whether it’s a company, landlord, council, or service provider, upload your complaint and ModernMail will print, stamp, and post it in the UK.
How it works
- Step 1
Upload your document
Upload a PDF or Word file — or write your letter in our editor.
- Step 2
Add the recipient
Enter the address for the organisation you’re complaining to. We’ll print it on the envelope.
- Step 3
We print and post
Choose postage (including signed-for or tracked), pay, and we print, stamp, and post your letter in the UK.
Why use ModernMail
No Post Office queue
Upload online and we handle printing, envelopes, and postage.
Same-day dispatch
Order before 4:30pm (Mon–Fri) for same-day posting.
Tracked options
Choose Signed For, Tracked, or Special Delivery when you need proof.
UK print and post
Designed for UK letter posting — clear pricing from £1.99.
What to include in a complaint letter
Clear complaints are easier to escalate later if needed.
- What happened
- Dates, order numbers, and a short factual summary.
- What you want
- Refund, repair, apology, or another specific outcome.
- Your details
- Full name, address, and the best way to contact you.
- Proof of sending
- Use Signed For or Tracked if you may escalate the complaint.
Frequently asked questions
Yes. Write or upload your complaint, enter the organisation’s postal address, and we’ll print and post it.
It’s often wise for formal complaints so you have better evidence of postage and delivery. You can choose Signed For or Tracked at checkout.
If they have a UK postal address, yes. You provide the recipient address; we print and post the letter.
Not yet — you provide the wording. We handle printing, envelopes, and postage.
Orders before 4:30pm on working days are usually dispatched the same day. Choose a faster Royal Mail service if the deadline is tight.
Ready when you are
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