UPS plays a vital role in the US and for people residing there. People send and receive their emails or packages through UPS. It benefits people a lot for the shipment purpose.
UPS deliver those packages at the doorsteps which do not require a signature of the candidate and they leave the package at the safer place i.e. place which is safer from weather and out of sight from the people.
If you want delivery of your package or mail in the first attempt only then you can leave the note otherwise no need.
Don’t forget to mention the safer place in the note of leaving the package that place can be anywhere in your home.