Splitting up the bill

Agreed wth most posts. If you’re out to eat let the server know before hand (or after) that what you ordered is on a separate bill. If I’m at a grocery store with my sister and her fiancé, unless it’s explicitly stated one of us is paying for the other, I hold my things and insist on separating my items.
Now I don’t do venmo but maybe that’s a thing to request?? Like if you cover ask them to send you their bit- I’ve done that with some friends when I’ve bought items for them..I cover it and they send me the money. I’ve also been out with friends where one person suggested we split the bill and someone else said it straight- I got one item, I’m not splitting a bill for everyone’s drinks (everyone else had multiple drinks) and I think that’s more than fair.

Hope this gets resolved!