Are you thinking in the line of "This product must be fake, because if it was real, it would never made past Customs. The officers would intercepted the package, therefore it would never reached my house" ?
No he's thinking along the line of how do I avoid taking this now I have it.
Can I trust them, it's a scam. Oh it turned up.
But maybe it's fake. So I can't take it unless it's verified.
But even if I get it verified, how do I know they aren't in on it.
Maybe it's a sicko who likes to hurt people.
Maybe it's rat poison.
Maybe it's not going to work.
Etc.
Anything you suggest will be met with a "yes, but..." [Eric Berne, Games People Play].
So why bother ordering it?
Drama. Me, me, me, everyone look at me. There will always be a pile of reasons why he can't take it, so the whole discussion is a pointless waste of time.
Just pour it down the drain OP and then you can start with the Hmm... CO method.
But how do I know it works.
What if the charcoal is fake.
What if it's a fake tent.
What if the meters fake and they're all in on it together.
What if........
Yes.... but......
Etc
Ad nauseum.