HELP i have nowhere else to ask

So basically I still live under my parents and I'm trying to make an online order (for pickup, there's a sale happening today and I can't go in person for reasons) for basically the first time. Okay so basically they ask you for a billing address, and I searched up what they use it for and it's for sending invoices? But idk do they send those invoices to the household itself (or to the head of household)? I'm going to pay instantly so it's not like there's be any due expenses, I just want to know if they might send any kind of proof of purchase like in mail or email format to anyone else in my household (notably my parents)? Also btw it's just some body mists don't be thinking that I'm buying anything CRAZY! Lmao, I just can't have my parents knowing that I'm spending money at all bc they'll call me irresponsible and whatnot yada yada yada. Pls help if you've ever had an experience that might help me or if you have any knwoledge on this!!!