The Payment Expert Podcast is joined by author and advisor David Birch to discuss what changes about security and trust once an AI agent, rather than a person, makes the purchase In the latest episode of the Payment Expert Podcast, David Birch, author, advisor and commentator on digital financial services, argues that the move from human to machine-initiated payments rests on a problem the industry has never fully solved: knowing who – or what – is on the other end of a transaction.