Pretty big accusation IMO - so I take it you have "visited" their plant? Maybe taken a trip to their labs and talked to their engineers?
Maybe you flew to Dubai and checked out that front?
Or does mom not have enough frequent flyer miles?
If you don't trust a person on a phone, or trust words on paper, then before you call it a scam you certainly best have taken the time to view its a scam with your own eyes which required "foot work"
These places exist! I have confirmation on the ground that has verified all this!