1. Sender's name and address information
2. Posti´s technical codes, e.g. a Priority label
3. Postage fee indications, e.g. a Port Payé or a postage stamp
4. Addressee's name and address information
The destination country's practice determines how address information should be written on international letters. The name of the country must always be written in CAPITAL LETTERS. For more information, visit the Universal Postal Unioin website.
When you give your address to someone living abroad or send mail from abroad to Finland, add the code FI- in front of the postal code and write FINLAND below it.