The product is expired.
'Scaduto' — ska-DU-to. Three syllables.
Use for food, cosmetics, or medicines sold past their expiry date. This is illegal in Italy and should be reported not just returned. Stay calm but firm.
'Scadere' means to expire (for food/documents). 'È scaduto' is passato prossimo. The expiry date on Italian products is shown as 'da consumarsi entro' (for food) or 'scadenza' (for medicines/cosmetics). Selling expired goods is a violation of Italian food safety law.
La data di scadenza era ieri.
The expiry date was yesterday.
Specific — shows you checked.
Era già scaduto quando l'ho comprato.
It was already expired when I bought it.
Implies the shop sold expired goods.
Voglio un rimborso immediato.
I want an immediate refund.
Firm — appropriate for expired goods.
Selling expired food in Italy can result in fines from the NAS (Nuclei Antisofisticazione e Sanità — food safety police). If a shop is uncooperative, you can report them to the local ASL (health authority).