I'd also like to know this too; when I send an invoice, I detail what they are buying (minus NSFW details) and indicate its digital delivery to help me, in case a Paypal case is ever opened. But when they pay their address is there... I also can't seem to figure out how to make them not need an address, even though I have selected ON my invoices their address isn't required U-U

The only way i have found they can send you money without an address is if they pay you(without using an invoice); goods and services and they select manually no shipping required (on a computer, not mobile app)

If you get a solution, please let me know ;__; I'd appreciate this info too!!~