Is an invoice available at HilltopAds?
You can top up your account in your personal account in the "Add Funds" section using the preferred method such as Paxum, PayPal, Wise, Capitalist,Credit card, USDT, Bitcoin or via wire transfer.
If you need to save an invoice, navigate to the Add Funds section. There find the required payment transaction and click on the symbol located in the invoice column.