Customer says he never took it? Four fields that settle it
Two litres of sunflower oil, ninety days ago. You remember the afternoon. The customer remembers a different afternoon, or none at all, and what's written in the book is "oil — 90".
That line is true and it is useless. It can't say which oil, which day, or who was standing there. An entry nobody can argue with isn't written better after the argument starts — it's written at the counter, in the ten seconds while they're still reaching for their bag.
Write the date, not "last week"
A line without a date can't be defended and can't be chased. You don't know when it's due, you don't know how old it is, and when it's questioned you're left saying "I think it was a Thursday." The customer isn't lying to you. Ninety days is long enough that neither of you honestly knows.
The date is also the field most often skipped, because at the counter it feels like the obvious part. It's obvious for about four days. In Venditorr it isn't a field at all — closing a sale as credit stamps the date on the record itself. A field you never type is a field you can't forget.
Name the thing, not the category
"Groceries — 240" tells a customer nothing they can recognise, so there's nothing for them to agree with. "2 L sunflower oil, 1 kg rice" puts a picture in their head. People rarely dispute a line they can see; they dispute a number attached to a word as broad as "groceries".
Write what you'd say out loud if you were handing it over. Quantity and unit included: two litres, one kilo, three packs. In the app the items come off the sale itself, so the entry reads back the same way you'd describe it, and it comes off your shelf count at the same time.
Show the arithmetic, not just the total
A total is a claim. A total with its parts is a receipt. "Oil 2 × 120 = 240" survives a question that "240" doesn't, because the customer can check the piece they doubt instead of doubting the whole line.
This matters most on the entries that grew slowly — the ones where a customer took something small on six separate days and now faces one number they never watched being built. Showing the six days is the difference between a conversation and a fight. On the customer card every movement stays its own line, in the order it happened, balance underneath.
Write down who actually took it
One account, several people collecting: a shop's account with two brothers, a household where the son comes for bread. When the balance is questioned, "your account" and "you personally" are not the same claim, and the person in front of you knows it.
A name on the line settles it without accusing anyone. It also tells you who to talk to, which is not always whose name is on the account. Put it in the note on the entry and it travels with that line for as long as the balance is open.
Where to start
Make the entry while they're still at the counter, not after closing. An entry written in front of the customer has already been agreed to — they watched it happen, and there is nothing to reconstruct later. Written after the shutter comes down, it's your memory against theirs, and by day ninety yours isn't better than theirs.
Turn the screen around while you're at it. Ten seconds at the counter costs less than one argument three months from now. Start free and write the next one down in front of whoever's buying.