[mcpvperz]

Courier disregarded the requirement for signature and just left the package at the door!

They've basically DNA'd themselves.

Get In touch the next day and say that you're still waiting for the package to arrive. Don't go Into anymore detail than that.

The investigation is pending on their side now.

What are your thoughts on a different amazon account with good standing attempting to SE to same address?

I wouldn't. AMZ is very very good at cross checking data.