I wouldn't describe it as a guarantee. The way it would operate is simply this. When the buyer acquires product from the seller, and then resells it—or maybe doesn't resell it, but we know this is perishable goods, so it will be resold—and receives something in return, which could be cash or could be an account receivable, but whatever that property is, it will be subject to a trust.
In other words, the buyer is under legal obligation to recognize that the property is beneficially owned by the seller until the seller is paid. It's not a guarantee, as I mentioned. If the buyer sells the product and gets cash, and spends the cash, dissipates the cash, then of course there's nothing for the trustee to attach to. Therefore, the seller is not protected. It's only when there is property that the buyer receives from the disposition of the product; it's only when that property is identifiable and can be protected that the system will operate.