How you receive an invoice depends on your payment arrangement.
If you pay by credit card
For standard self-serve subscriptions paid by card, manage your billing details from your account area. Paid invoices are available from the billing or invoices section after payment processing is completed.
If you need invoice billing
If you want an invoice for bank transfer, contact Sales. This applies to customers who need a non-card billing arrangement.
Enterprise options
Enterprise plans can also be arranged through Google Cloud Marketplace where applicable.