Abbiamo passato un mese ma il formaggio è sigillato. Posso mangiarlo?

Cheese can usually be kept for 4 to 12 weeks beyond the expiry date if well refrigerated.

I only recommend being very careful with raw milk products.

Just stick to these 3 points:

Look, smell and taste.

And if in doubt, dispose of it.

It is more critical with cooked pasta, as you can get very sick very quickly, so it is better to dispose of it immediately if in doubt.