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A letter is a flexible and affordable solution for many sending needs. It is suitable for personal and effective communications and for invoicing. Select sending letters without being a contract customer when you send fewer than 10 letters a week. When your company needs to send more items, become a contract customer!

Letter Services product terms for contract customers will be updated 1.8.2020. The SLA’s for Priority and Economy letters and Customer Direct, among others, have been specified in more detail. The changes will not have an effect on the service prices.See the terms

Letter type
Regular letter

Take the letter to a mailbox. Delivery to the recipient’s mailbox, 4 working days.

Cash on Delivery Letter

Take to a Posti outlet. Items are handed over against an acknowledgement when the COD amount has been paid. Delivery in 2–3 working days.


Send e-invoices to corporate recipients. You do not need investments or a separate invoicing system – you only pay the transaction fee for the invoices you send.

Electronic letter

Deliver your letters to the recipient safely and with appropriate authentication using Omaposti.

Express Letter

Suitable for sending urgent messages, documents and drafts. Take to a Posti outlet. Delivery to the recipient’s mailbox, 1–2 working days.

Registered letter

For sending payment cards, decisions and information, among other things. Handed over against acknowledgement, 2–3 working days.

New customer?

If you send more than 10 letters per week, you should become a Posti contract customer. As a contract customer, you get business IDs for services and subscription channels.

Find the best sending services for your company’s needs

Send without a contract

For sending fast and occasionally

  • Print and send your letters yourself
  • No recommended number of items, which makes the service particularly suitable if you send fewer than 10 letters per week
Send with a contract

For sending letters regularly

  • Handle the mailing online or place the letters in envelopes yourself
  • The recommended number of items is over 10 letters per week
Send with a contract

When you send letters in large quantities or need help with the mailing

  • Sending of regular daily mail yourself or as a service
  • The recommended number of items is around 100 letters per week