The Courier scam is a very common email scam.
You get a message that seems to be from a courier company saying that they tried to deliver a parcel to you but weren’t able to and you just need to confirm your details so they can re-deliver the item.
Confirming your details usually means to open the attached document which might claim to be a delivery note or an address slip or a label or anything to get you to open it.
Do not open the attachment.
Alternatively there may be a link they want you to click on – typically this takes you to a fake website asking for identity information which they can then sell.
Or sometimes there a premium rate phone number to call – they ask for those same identity information and may ask you to pay a handling charge by credit card. Of course they then use your credit card details to buy goods.
If you receive an email saying there is a parcel to be delivered – either delete it or if you want to be sure then contact the courier directly – (look up their contact details on the Internet)
Don’t be deceived.