They will either return it to sender or keep it and destroy it , depending on the amount or the mood of LE at that time they will either do an investigation or not bother with it too much . If they have enough leads, they will try to trap you , if they have enough evidence,they will raid you , if they feel like they can contact you in some type of way but they really don’t have enough evidence , they will simply sent you a love letter , saying they seized your parcel and you got to come get it etc. Either per e-mail or physical mail.
It’s important to change drops and id‘s .