Sending all the positive energy I can your way; don't let the details get in the way of your grieving & healing; I agree with most of the others here. Mail it & get it off your plate.
Since others live in the house, you may want to send it registered mail with a return receipt. Then you are (hopefully!) assured the right person got it & have proof you didn't keep it in the event someone in the family gets vindictive.
Best wishes to you.