This happened to me one time using the same OP. Not the OP's fault. I was getting ready to leave for the evening and it was getting near 5pm and UPS usually runs about 3-4.
I went to website and checked status and it said "left on porch".
I went out and looked on porch, looked around bushes, knocked on neighbors doors and nobody had seen my letter with meds. I was kind of freaking out.
I called UPS and they hooked me up with the local supervisor. I told him what had happened and he said he would contact the driver. I just knew it was at another door and somebody had opened it.
I returned home about 12 midnight and the letter was leaning up against the door. I guess the driver remembered where he took it.
Everytime I am expecting meds, I dont leave until they arrive. That is why I pay 6-7 more dollars and get AM delivery because UPS is not careful with their packages.