commutation

siirto

työmatkaliikenne

rangaistuksen muuntamismääräys

rangaistuksen lievennys puhekieltä A passing from one state to another; change; alteration; mutation.
puhekieltä The act of giving one thing for another; barter; exchange.
puhekieltä substitution Substitution of one thing for another; interchange.
Specifically, the substitution of one kind of payment for another, especially a switch to monetary payment from obligations of labour.
1969, Philip Ziegler, The Black Death, Folio Society 2006, p. 213:

Professor Postan has argued in favour of a rapid move towards commutation in the twelfth century which slackened or even went into reverse in the course of the thirteenth.

Monsieur the Marquis de Sade was now holed up in one of his châteaux while his wife worked for the commutation of a sentence passed on him recently for poisoning and buggery.