The nommo mark
Is it the real one?
Every record, book and other physical object bought on nommo has a mark of its own, printed on the card that comes with it. Type the code here, or point a phone at the card, and nommo will show you its own record of that object: what it is, who made it, and how it has changed hands.
A card can be copied. An owner cannot.
The mark shows that nommo has a record of the object. To know that the person in front of you holds it, ask them to open this same page while signed in. They will be shown six figures that change every five minutes. Type them in, and nommo tells you whether they are the owner on record.
What nommo will not tell you
Who the owner is, or where the object was sent. The record is about the object, not the person.