Peter Baumbach says:

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I think that American Express wouldn't be interested in anonymous cash because the most important "feature" of a traveller's check is the lack of transferability. Once they're bought, only one person can spend them. [...] I think American Express would be interested in collecting a

Peter Wayner says: percentage of the cash-flow. The underground economy is pretty big. Wouldn't it be nice to get a percentage of it?

No. They have a special relationship with many governments around the world and in order to keep it are extremely careful not to involve themselves in anything that even remotely smells, especially after the Safra affair a few years ago. Perry