Paper delivery tag was left on our gate by a "Metro Courier" indicating that a signature was required.  The funny thing was that the "courier" was walking away from me as I came out - she could have easily given me the tag or whatever I was supposedly to sign for.

Along with the 480-388-3145 number, another was on the tag 877-261-1149.  When I googled that a Guardian Wireless Security site came up.  Was a scam... I am waiting for a delivery and would have called and gotten a crappy phone solicitation.  The "Adult Signature Required" is just a ploy to get you to call to see what went undelivered.

I got a door tag "Delivered by a Metro Courier" adult min. 21 yrs of age signature required...I'm not expecting a package? Is it a process server?

Yep, it's a scam coming from that number - they try to get you to buy security systems for your home.

Yeh, They said I would get $1,000 worth of coupons as a 'Welcome Wagon' for my new home and offered to send it to me via email. Unfortunately I gave them my email address. She then said 'one of the companies that is sponsoring the wagon has a special offer'. That's when she kept going on about the security system. She tried to suggest that I 'didn't value security', which is when I started to get really upset. I am still waiting for my email of coupons by the way...

I had a similar experience with the tag being left on my house while I was home. When I called the number on the tag and told the woman I did not want any coupons delivered, she hung up on me. I am going to be reporting this company to the Attorney General's Office for deceptive business practices.