I'm surprised to hear mustard sauce isn't commonly sold over there. I hooe you find one. Don't add too much on your sandwich or else it will taste very sour. XD
I buy mine at the store. They don't take the expired ones out from the shelf? The store might get sued for selling expired foods.
Nah we have to report it to them manually haha. Some of the stores even put a sign to check before buying to get out of trouble.
I order online from a local e commerce website and sometime ago I got an expired fresh cream lol. The company was good so they gave me a refund instantly.