Do you go with the free/cheapest shipping options? I don't think I've ever had to sign for one of those with PA.
There was a time when PA allowed for shipping options, and the cheapest one never used to ask for a signature. At some point, they begin to have delays and a big amount of missing packages. So once they begin to include "free" shipping by their own accord, that's when I believe they started having a signature for that option. I think they started having to many charge backs and issues with not having signatures, so now it's mandatory.
As I stated, this appears to be left to the whims of the postal person delivering said package, as mine show "signature required". That's why when ever those are left, the postman has to put "left with individual", even though he leaves it in the box. Because if there's ever an issue, he can't claim I signed for it, if it was labeled "left in box/or at the door". Of course I've never signed, so if it came to that, it's his ass, but it's on him and that's the risk he takes to save a few minutes.
That's what I'm hoping will happen with mine. It just had me a little concerned when I ordered that it said signature required.
My last serious out of country purchases were back in the days of Liksang when the Dreamcast had it's last run of unofficial releases. Even back then I'd lean more towards NCSX.com to be 100% sure what I was buying was legit. These days I mostly lean towards Amazon for imports (from US resellers) or on the rare occasion Ebay.
Damn, hearing Lik-Sang takes me back, that place was the BOMB! And NCSX was my go to spot back in my crazy "N" import days, as I was on a first name basis with girl who took phone orders at the time, so that should tell anyone how bad my addiction was. LOL