Do all foods have to have a sell by date or use by date . As Tesco Redmere Farm potatoes, and Tesco Nightingale Farm peppers have no date what's so ever. I did ask a shop worker this morning why they didn't have a date on them he said he didn't know why. I asked him if all perishable food should have a date, he said no, not all. I thought all food had to have a sell by date, am I wrong?