Finland

Collective redressOpt-in/Opt-outLegislation
YesOpt-inAct 444/2007 on Group Actions (Ryhmäkannelaki)

Finnish collective redress framework 

In Finland, the Consumer Ombudsman can promote a collective action. 
The following requirements must be met for the admissibility of the application: numerousity; commonality; expediency; definability.