If it's a subscription to KPN with a phone then you have to sign the contract when the delivery guy is infront of your door. If you're not home they will send it to the nearest PostNL location you will receive a note in your mailbox with were to find it. Bring a valid ID to show your the owner of the package.

Hi @Slkeyo, 

You should've recieved a PostNL track and trace code. If you're not home, they will either deliver it to your neighbours or try again at another time. You can also chose a pick-up point through the PostNL app. If the package happens to get damaged we of course are able to send you a replacement if necassary.