Regulation 5 Invoices and credit notes etc: general
An invoice or credit note issued by the Settlement Body must set out the determination of the amount which the recipient is liable to pay, or is entitled to receive, in such detail as will readily show the recipient how the determination has been made.
An invoice must specify the day by which it is to be paid, which must be not less than 3 working days after the date on which the invoice is issued.
Where an electricity supplier has provided the Settlement Body with an address for the electronic service of invoices and credit notes, the Settlement Body must in addition send an invoice or credit note electronically to the address provided.
Any invoice, credit note or other document issued or given under these Regulations must be in writing and dated.