When to redeem latest does definitely depends on the country of consumption. Also which information is needed for redemption from your side. Some Information are more or less needed for all systems:
- Volume of redeemed EACs … (MWh)
- Beneficiary (end-user)
- Beneficiary location (address of the entity, for which the EACs are)
- Consumption period … (year) … most times automatically
- Redemption Purpose … sometime one can choose from a selection, sometimes one can fill it out
And before one can redeem EACs, one has to choose from which power plant(s) the EACs should be. In case certain additional criteria have to be fulfilled (of course this has to be specified with the purchase of the EACs).