Finnish addresses use a five-digit postcode before the city and place the house number after the street. Posti routes on the postcode, and the leading zeros on Helsinki-area codes trip up forms that treat the code as a number. Here is the format and how to validate it.
A Finnish label is recipient, the street with the number and any stairwell and apartment, then the postcode and city on one line, then the country.
Matti Virtanen personal or business recipientMannerheimintie 12 A 5 street, number, then stairwell letter and apartment (<code>A 5</code>) if any00100 Helsinki 5-digit postcode, then the cityFINLAND required for inbound international shipmentsThe five-digit postcode is Posti's core routing field and precedes the city. Helsinki-area codes begin with zeros that must be preserved.
The country-specific rules that generic autocomplete and single-line address fields tend to get wrong.
Central Helsinki postcodes begin with zeros (00100). A form that treats the postcode as a number and strips them produces an invalid code.
Finnish apartments use a stairwell letter and unit number after the street number, for example 12 A 5. Keeping this format helps couriers find the door.
Finnish addresses write the street then the number: Mannerheimintie 12. Number-first order is read wrong.
Posti routes on the postcode, not a region (maakunta). Adding a region field only clutters the label.
Each of these passes a basic "is this field filled in" check but fails at the carrier, turning into a redelivery, a return, or an address correction fee.
100 instead of 00100 is not a valid Helsinki code.A 5 style detail for last-mile delivery.How the major carriers handle Finland addresses, and what your label needs to satisfy each one.
The national postal operator in Finland. Routing is five-digit-postcode driven, so a valid code with its leading zeros is the key field.
Major parcel and pickup-point carriers for Finnish ecommerce. They expect the street-then-number order, stairwell and apartment, and a clean postcode and city.
International carriers for inbound shipments. Include the country line; an accurate postcode avoids routing delays.
Address Guard checks Finland addresses against carrier and postal databases before the order ships, normalizes the format, and flags the errors that cause failed deliveries. 240+ countries, $0.05 per check.
Part of the Address Guard international address format guide, covering 240+ countries.