The cost of living bonus was paid last week to qualifying social welfare recipients, and is separate from any credit on electricity bills (which was coincidentally 200 euro including vat). The most recent electricity credit was added to bills around 1 March, and was the third of three credit amounts. It's shown on bills as 183 euro (approx) credit and a vat credit which adds up to 200 euro.
The cost of living bonus is paid by the same method as the qualifying social welfare payment (bank or post office)