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Send a letter to your energy supplier online
Billing disputes, complaints about a smart meter, deemed contract queries or a formal complaint before going to the Energy Ombudsman - write it here and we'll post it the same working day.
How it works
Three steps, no printer required
1. Write or upload
Type your letter in the composer or upload a PDF / Word doc. We pre-fill the right Royal Mail service for this destination.
2. We print, fold and frank
Your letter is printed on quality 100gsm paper at our UK facility, folded, sealed and franked - usually the same working day.
3. Royal Mail delivers
Handed to Royal Mail for delivery on the service you chose, with a tracking link emailed to you where applicable.
Start by complaining directly to your gas or electricity supplier using its published complaints process. State the account reference, the issue, when it began and the remedy you want. Keep dated copies or references whether you complain by post, email, telephone or webchat. A physical letter is an option, not a requirement for making a valid complaint.
For eligible supplier disputes in Great Britain, Energy Ombudsman's current process allows escalation after eight weeks unresolved, or earlier if the supplier issues a deadlock letter. Suppliers do not have to issue a deadlock letter for every unresolved case before that period expires. Northern Ireland has different arrangements, so check the correct route.
For estimated bills, back-billing charges, smart meter problems or switching disputes, include relevant bills, payments, readings and previous replies. If you prefer post, choose a service suited to your evidence needs. Proof of postage confirms posting; Signed For adds signature confirmation, not full end-to-end tracking or a guarantee of complaint acceptance.
Already eligible to escalate? Use the Energy Ombudsman complaint letter template rather than sending another initial complaint.
Understand a final response with our deadlock letter guide.
For solar installation or finance issues, first check our solar panel complaints guide.
Why send through us
- Posts to any UK energy supplier's complaints or customer service address
- Signed For recommended for billing disputes and formal complaints
- Same-day despatch before 2:30pm UK time
- Free proof of postage certificate with every letter
- No printer, envelope or stamp needed at your end
Pricing
From £2.99 · Signed For from £8.54 (recommended for formal complaints).
Includes printing, folding, envelope, Royal Mail postage and same-day despatch from our UK facility.
Start writingFrequently asked questions
Where do I find my energy supplier's complaints address?
Check a recent bill or your online account under 'Complaints' or 'How to complain' - most suppliers publish a specific complaints address that's separate from their general correspondence address. If you can't find it, your supplier's website will have a dedicated complaints page listing it, as required by Ofgem.
What happens if my energy supplier doesn't resolve my complaint?
For eligible gas or electricity supplier complaints in Great Britain, Energy Ombudsman's current process allows escalation free of charge after eight weeks unresolved or earlier with a supplier-issued deadlock letter. Check energyombudsman.org for current eligibility, evidence requirements and submission routes. The scheme decides the appropriate remedy.
Can I dispute a back-billing charge by letter?
Yes. Give the disputed billing period, readings, payments and reasons you believe the bill is wrong. Ofgem back-billing protections can apply to qualifying charges for energy used more than 12 months ago, but exceptions exist. Check the current official rules before claiming that a charge must be removed.
How quickly will my letter be posted?
If you place your order before 2:30pm UK time on a working day, your letter goes into the post the same day. Orders placed at or after 2:30pm UK time, at weekends, or on UK bank holidays are despatched on the next working day.
Is my letter content kept private?
Yes. Content is encrypted in transit (TLS 1.3) and at rest (AES-256), retained for 90 days for re-print in case of return, then automatically deleted. We are UK GDPR compliant and registered with the ICO.
Ready to send your letter?
Type or upload your letter. We print, fold, frank and post it from our UK facility - usually the same working day.
Compose your letter