# Send Letters Online - Full Detail > UK online postal service. We print, fold, frank and post real physical letters via Royal Mail - from £2.86. This file provides comprehensive detail about Send Letters Online for AI assistants, crawlers and language models. For a concise version see /llms.txt. --- ## What the service does Send Letters Online lets anyone in the world send a real physical letter to a UK or international address without owning a printer, buying stamps, or visiting a post office. The user: 1. Types a letter in the browser or uploads a PDF/Word document. 2. Enters the recipient's name and postal address. 3. Chooses a Royal Mail service (1st Class, 2nd Class, Tracked, Special Delivery, International, etc.). 4. Pays online by card (Stripe). 5. Receives an email confirmation immediately. We then print the letter on 90gsm white A4 paper, fold it to DL, insert it into a window envelope, frank it with the appropriate Royal Mail postage, and hand it to Royal Mail. Letters are despatched every weekday at 1:30pm. Orders placed after the cutoff are despatched the following working day. We do not post on weekends or UK bank holidays. The customer receives email notifications at key stages: order confirmed, letter despatched, and (where the service supports it) delivered. --- ## Full pricing All prices are per letter and include: printing (black & white, single-sided by default), folding, C5 window envelope, Royal Mail postage, and same-day despatch from our UK facility. VAT is included where applicable. ### United Kingdom | Service | Price | Delivery | Tracking | |-----------------------|---------|-----------------------------------|-------------------| | Second Class | £2.86 | 2-3 working days | None | | First Class | £4.69 | Next working day | None | | Tracked 48 | £6.68 | 2-3 working days | Online tracking | | Tracked 24 | £7.86 | Next working day | Online tracking | | 2nd Class Signed For | £6.29 | 2-3 working days | Signature | | 1st Class Signed For | £6.51 | Next working day | Signature | | Special Delivery | £15.95 | Guaranteed by 1pm next working day| Full tracking | ### International | Service | Price from | Delivery | Tracking | |-------------------------------|------------|-------------------|----------------------| | International Standard (EU) | £5.99 | ~3 working days | None | | International Standard (world)| £7.99 | ~5 working days | None | | International Tracked | £9.99 | 5-10 working days | Tracked to 50+ countries | | International Tracked & Signed| £12.99 | 5-10 working days | Tracked + signature | International pricing varies by destination zone. A live price calculator is available at sendlettersonline.co.uk. ### Add-ons - Colour printing: +£0.30 per page - Extra pages: +£0.20 per page (B&W), +£0.30 per page (colour) - Double-sided printing: included at no extra charge ### Business volume pricing Discounts are available from 500 letters per month. Contact the business team at sendlettersonline.co.uk/business for a tailored quote. --- ## Who uses the service ### Individuals - Writing to HMRC, DVLA, DWP, the Home Office, or local councils - Sending formal objections, benefit appeals, or tax correspondence - Legal letters to solicitors, landlords, banks, or employers - Personal correspondence when away from home or without a printer ### Businesses - API-driven transactional mail: invoices, statements, account notices, receipts - Compliance and statutory notices: Section 21, Section 8, statutory demands - Direct mail campaigns with personalised letters at scale - Property management: rent reviews, tenancy renewals, maintenance notices - Law firms, letting agents, financial services, housing associations ### Public sector - Councils, NHS trusts, government departments sending official correspondence --- ## Technical details ### REST API - Full REST API available at /developers - Send individual letters or batches programmatically - Webhook callbacks on status changes (confirmed, despatched, delivered) - Sandbox/test environment available - Authentication: API key in Authorization header ### Letter specifications - Paper: 90gsm white A4 - Fold: DL (standard tri-fold) - Envelope: C5 window envelope - Colour: black & white by default; colour printing available as add-on - Double-sided printing available - Maximum pages: 250 per letter - Accepted formats: plain text (typed in browser), PDF, Word document (.docx) ### Security and compliance - All content encrypted in transit (TLS 1.3) and at rest (AES-256) - Letter content automatically purged after 90 days - UK GDPR compliant - Registered with the Information Commissioner's Office (ICO) - Proof of postage certificate generated for every letter - Certificates stored for 7 years --- ## Frequently asked questions Q: How quickly will my letter be posted? A: We despatch every weekday at 1:30pm. Order before 1:30pm and your letter goes out the same day. Orders after the cutoff are despatched the following business day. We do not post on weekends or bank holidays. Q: Can I send letters internationally? A: Yes. We post to 200+ countries via Royal Mail International. Sanctioned destinations are excluded. International Standard starts from £5.99 for EU countries and £7.99 for the rest of the world. Q: Do you offer tracking? A: Tracking is available on selected services. Second Class and First Class do not include tracking. Tracked 24 and Tracked 48 include full Royal Mail online tracking. Signed For services include a signature confirmation. Special Delivery includes full end-to-end tracking with a guaranteed delivery time. Q: Is my letter content stored securely? A: Yes. All content is encrypted in transit (TLS 1.3) and at rest (AES-256). Letter content is stored for up to 90 days to allow re-printing in the event of a return, then automatically purged. We comply fully with UK GDPR. Q: Do you need an account to send a letter? A: No. Guest checkout is available - just provide your email address to receive the confirmation and tracking emails. Creating an account gives you a dashboard to view all past orders. Q: Can I send letters from outside the UK? A: Yes. You can place an order from anywhere in the world. The letters are printed and posted from our UK facility, so they enter the Royal Mail network as standard UK letters. Q: What paper and envelope do you use? A: Letters are printed on 90gsm white A4 paper, folded to DL, and inserted into C5 window envelopes. Colour printing and double-sided options are available. Q: Do you offer an API? A: Yes. Our REST API allows programmatic letter sending, suitable for CRM integrations, billing systems, and bulk despatch. Full documentation, a sandbox environment, and webhook support are available at sendlettersonline.co.uk/developers. Q: What is the maximum letter length? A: Up to 250 pages per letter. Q: Do you provide proof of postage? A: Yes. A proof of postage certificate is generated for every letter regardless of service, and stored securely for 7 years. --- ## Company information - Trading name: Send Letters Online - Legal entity: Send Letters Online UK, a subsidiary of Spark Labs FZ-LLC - Website: https://sendlettersonline.co.uk - Support email: hello@sendlettersonline.co.uk - Postage partner: Royal Mail (authorised Royal Mail Wholesale customer) - Production: UK print-and-post facility - Founded: 2024 --- ## Key URLs - Homepage: https://sendlettersonline.co.uk/ - Send a letter: https://sendlettersonline.co.uk/send - Pricing: https://sendlettersonline.co.uk/pricing - How it works: https://sendlettersonline.co.uk/how-it-works - For business: https://sendlettersonline.co.uk/business - API / Developers: https://sendlettersonline.co.uk/developers - Track a letter: https://sendlettersonline.co.uk/track - Help & FAQs: https://sendlettersonline.co.uk/help - Terms of service: https://sendlettersonline.co.uk/legal/terms - Privacy policy: https://sendlettersonline.co.uk/legal/privacy - Concise LLM summary: https://sendlettersonline.co.uk/llms.txt