Send Letters OnlineSend Letters Online UK
Send letters online in the UK. Real letters, zero hassle.
The easiest way to send letters online in the UK. Type your letter, choose a service, and we'll print, fold, frank and post it via Royal Mail - from £2.99.
Send Letters Online lets you order letters online while in the UK or abroad. Every letter is printed and posted from our UK facility, regardless of where you place the order. Type or upload your letter, enter the recipient's address, and we print it, prepare it for posting and hand it to Royal Mail. Orders placed before 1:30pm UK time on a working day are despatched the same day. Base prices start at £2.99 for Second Class, with First Class, Signed For, Tracked 24/48, Special Delivery and International Standard available. Proof of postage is available on eligible orders once despatch is confirmed. It confirms posting, not delivery, receipt of the contents or valid legal service. A payment receipt is not proof of postage.
How it works
From draft to doormat in three steps. Nothing to install or set up.
Read our step-by-step guide to sending a letter online in the UK.
Write or upload your letter
Type your message directly in the browser, or upload an existing PDF. Our system formats it automatically. Add your recipient's address and we handle the rest.
We print and post from the UK
Letters are printed on white A4 paper. Envelope size and document preparation depend on page count and postal route; do not assume every document uses a C5 envelope. Colour printing is available at an additional per-page cost. Double-sided printing has no additional print surcharge. Letters are despatched on working days, excluding UK bank holidays.
Proof of postage after despatch
Proof of postage is available on eligible orders once despatch is confirmed. It confirms posting, not delivery, receipt of the contents or valid legal service. A payment receipt is not proof of postage.
See it in action
Send letters online vs going to the Post Office
Compare sending a printed letter online with preparing it yourself and visiting a UK Post Office branch.
| Feature | Send Letters Online | Post Office / doing it yourself |
|---|---|---|
| Printer needed | No | Yes |
| Stamps or franking | Included | Buy separately |
| Travel and queuing | None | Yes |
| Cut-off for same-day posting | 1:30pm weekdays | Branch opening hours |
| Proof of postage | Available on eligible orders after confirmed despatch | Ask for a certificate when posting |
| Tracking link | On tracked services | On tracked services |
| Order UK letters while abroad | Yes, printed and posted from our UK facility | Requires a visit to a UK branch |
| Second Class base price | £2.99 (print, envelope, postage; card fee extra) | Stamp price plus paper, ink and envelope |
Prices include printing, envelope and postage. A £0.99 processing fee applies to card checkout; prepaid balance payments do not add this per-order fee. Certificates become available once despatch is confirmed. The DIY comparison assumes a printed letter and a branch visit: handwritten letters do not need a printer, and posting into a postbox avoids queuing. You can place an order while outside the UK, but your letter is printed and posted from our UK facility, not shipped from your location abroad. The comparison is with visiting a UK branch, not with overseas postal services.
Who sends with us
Individuals, businesses, and public sector organisations across the UK.
Government correspondence
Write to HMRC, DVLA, DWP, the Home Office, or your local council. We ensure your letters meet official requirements and arrive with proof of delivery. Common uses: tax returns, formal objections, benefit appeals.
Legal and formal letters
Send to solicitors, landlords, banks, and employers. Every letter is tracked and timestamped. Signed For and Special Delivery available for matters requiring formal proof of receipt.
API-driven transactional mail
Integrate with our REST API to send invoices, statements, receipts, and account notices at scale. Trigger letters from your CRM, ERP, or billing system without touching a printer.
Compliance and statutory notices
Section 21 notices, Section 8 notices, statutory demands, and company filings. Certified despatch records and proof of postage for every document. Signed For and Special Delivery options.
Direct mail campaigns
Send personalised physical letters at scale. Upload a CSV of recipients and merge variables, or connect via API. Colour printing and A4/A5 formats available for maximum impact.
Property and lettings
Landlords, letting agents, and management companies use us for rent reviews, tenancy renewals, maintenance notices, and formal termination letters, with full audit trails.
Transparent pricing
No monthly fees, no minimums. Pay per letter.
Volume discounts available from 100 letters per month. Contact our business team for a tailored quote.
Full pricing breakdownFirst page included in every price · Extra pages: +£0.20 B&W · +£0.30 colour · Double-sided at no extra charge
Why Send Letters Online?
We built this service because sending a physical letter is still surprisingly difficult. Here is what makes us different.
Same-day despatch
Order before 1:30pm UK time on a working day for same-day despatch. Orders after the cut-off, at weekends or on UK bank holidays are processed the next working day.
Genuine Royal Mail integration
Your letters are printed and posted from the UK for delivery through Royal Mail. Tracking is available on supported services; standard First Class, Second Class and International Standard are untracked.
Private document handling
Letter content and uploaded files are private. Access to order documents is restricted to authorised requests. Fulfilment requires processing by our printing and postal service providers. See our Privacy Policy for processing, retention and data-rights information.
REST API for developers
Enabled accounts can check their prepaid balance, upload documents, create paid individual letter orders and poll order status through our REST API. API order creation is live and billable. There is no free-send sandbox, official SDK or customer delivery webhook currently offered. Use standard HTTP clients and polling; repeated sending requires your own integration.
Building with AI agents? Our MCP server lets assistants send letters directly.
Help with your order
Contact our support team for help with your letter, order progress or available documents. Include your order reference so we can investigate.
No contract or minimum spend
Pay per letter. No monthly fee, no setup fee, no minimum volume. Business accounts unlock volume pricing from 100 letters per month.
What our customers say
4.9 / 5 · Verified reviews"We send hundreds of letters a month through the API. It is reliable, the pricing is transparent, and nothing has ever gone missing. The Signed For option gives our compliance team the audit trail they require."
"I used to dread writing to HMRC. Now I do it from my phone in under five minutes. The tracking confirmation means I can prove when a letter arrived, which matters when you are in a dispute."
"We integrated Send Letters Online with our case management system. Statutory notices go out automatically, tracked, with proof of despatch stored against the case file. It has saved us hours each week."
Popular destinations
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Frequently asked questions
Anything else? Contact our support team and include your order reference.
Visit the help centreHow do I send a letter online in the UK?
To send a letter online with Send Letters Online, simply type or upload your letter on our website, enter the recipient's address, choose your Royal Mail service, and pay. We print, fold, frank and post it from our UK facility - usually the same day if ordered before 1:30pm.
How quickly will my letter be posted?
We despatch letters every weekday at 1:30pm. If you place an order before 1:30pm on a weekday, your letter will be posted the same day. Orders after the cutoff are processed the following business day. We do not post on weekends or UK bank holidays.
What types of letters can I send?
You can send personal correspondence, invoices, notices and formal letters by typing your content or uploading a supported document. Check our Acceptable Use Policy and any recipient-specific instructions. You are responsible for checking deadlines and legal-service requirements.
Can I send letters to addresses outside the UK?
Yes. All letters are printed and posted from our UK facility, even when you place the order from abroad. International Standard base prices start at £7.99 in zone 1. The website currently offers untracked International Standard to supported destinations. Availability and prices depend on the destination and document. Checkout confirms the available service and final total; delivery estimates are not guarantees.
Do you offer tracking for every letter?
No. Second Class and First Class do not include tracking. Signed For includes signature confirmation rather than full end-to-end tracking. Tracked 24, Tracked 48 and Special Delivery support Royal Mail tracking. The website currently offers untracked International Standard to supported destinations. Availability and prices depend on the destination and document. Checkout confirms the available service and final total; delivery estimates are not guarantees. Proof of postage is available on eligible orders once despatch is confirmed. It confirms posting, not delivery, receipt of the contents or valid legal service. A payment receipt is not proof of postage.
Is my letter content stored securely?
Letter content and uploaded files are private. Access to order documents is restricted to authorised requests. Fulfilment requires processing by our printing and postal service providers. See our Privacy Policy for processing, retention and data-rights information.
Do you offer an API for bulk sending?
Enabled accounts can check their prepaid balance, upload documents, create paid individual letter orders and poll order status through our REST API. API order creation is live and billable. There is no free-send sandbox, official SDK or customer delivery webhook currently offered. Use standard HTTP clients and polling; repeated sending requires your own integration.
What paper and envelope do you use?
Letters are printed on white A4 paper. Envelope size and document preparation depend on page count and postal route; do not assume every document uses a C5 envelope. Colour printing is available at an additional per-page cost. Double-sided printing has no additional print surcharge.
Send Letters Online is operated by Spark Labs FZ-LLC, based in the United Arab Emirates. Our letter-printing and posting service operates in the UK, with Royal Mail delivery in the UK and internationally. Founded in May 2026.
Spark Labs FZ-LLC: VUET1764 Compass Building, Al Hulaila, Al Hulaila Industrial Zone-FZ, Ras Al Khaimah, United Arab Emirates. PO Box (Dubai): 338482. Tel: +971509880345Ready to post your letter?
No subscription. No minimum. Pay as you go. First letter sent in under five minutes.