Using the international reply coupon, a person sending a letter abroad can pay the postage of the reply letter on behalf of the addressee. Reply Mail Coupons purchased in Finland will be redeemed in all countries and they will be exchanged for stamps or postal stationery equivalent to the postage fee of the lowest weight category of international letter mail. A reply coupon presented for exchange in Finland will be exchanged for stamps to the value of 1.85 euros.
The reply coupon has been approved by the Universal Postal Union (UPU), and has the same appearance in every country. The period of validity is printed on the reply coupon.