All I need when I buy something online is the shipping tracking number. That's it. I don't need an invoice. What am I going to do with that, print it out and stare at it? I don't need constant tracking updates. I can get these myself with the tracking number. I don't need to know it was delivered (again, tracking number, and I can also just look on the porch with my eyeballs). I don't need any of the other sales-spam that always seems to accompany these orders. An online merchant shouldn't even need my E-mail address. I should be able to click "buy" and the next page shows me the tracking number. That's the only relationship I want with you!
I would never want to not receive a receipt for an online purchase unless it was a $5 doodad that I didn’t even care if it arrived. You are out there on that one. If i want to know when i bought something for a warranty searching my email is the way.
The sales spam is obviously out of control though. But i just have a separate email address for shopping and a filter that marks anything with the word unsubscribe or manage your preferences as read and puts it in a folder I never open. I shouldn’t have to do that but i shouldn’t have to run an adblocker either.
An invoice/receipt is often necessary for booking purposes, reimbursements, taxes, etc. But to your point, just put it in the same email as the tracking number and move on.
I appreciate having a receipt. There are plenty of times when I’ve had to look up info about a past purchase. When did I buy it? How much did it cost last time? Which model did I end up choosing?
Certainly not for every product but enough that I appreciate it