You need to watch BBC's Watchdog programme about Yodel and disappearing parcels.
Could have been thrown over into your garden as Yodel delivery was shown on TV recently.
You call the carrier, Yodel and ask about it.
I was expected a parcel to be delivered today (named day delivery). I was in the shower when the doorbell went but I thought it would be fine because no signature was required (it said so when the item was dispatched). They have just left the parcel in the porch in the past without me coming to sign for it. I came downstairs and looked in the porch, nothing there. I went online to check the tracking information and it said it had been delivered, but I can't find the parcel anywhere. No card was left either. What do I do now? The courier was Yodel if that helps.