Ideally a parcel is delivered to you personally.  Another member of your household can also accept your parcel on your behalf. If nobody is present our shipping carrier GLS asks a neighbour if they can accept the parcel for you. 

If no parcel delivery is possible – not even at a neighbour – GLS will take the parcel back to the depot (distribution centre). If the parcel cannot be delivered to the specified delivery address, the GLS delivery driver will leave a notification card. It holds key information such as the neighbour’s name or about the GLS depot. On the notification card is a number, the "Track ID". You can use either this number or the parcel number to track your parcel online or from your smartphone. The Track ID is particularly important if GLS took your parcel back to the depot. Then you can use the number to redirect the parcel online. This means, you can decide yourself what happens next. 

GLS will undertake a second delivery attempt if no neighbour is able to accept the parcel.