Did you contact your source and ask them if they sent it "signature required?"
That would be step #1 IMO.
In the past I used to get INT version and it always required a sig, per HK..Not sure how he does it nowadays.
You could always tell them to return to sender or just not pick it up and hope they return to sender in a timely manner, and then ask the Source to resend on your shipping dime worse case scenario. But yeah I'd imagine if it's the Post Office they are gonna want and check a valid I.D.