Yes (as a general rule). The key to this answer is the fact that the manufactuer already began to fill the order. Once you take action in reliance upon your customer's order, and then you incur a charge...this is known as "detrimental reliance." You relied on your customer's word -- to your own personal financial detriment. Therefore, your customer is on the hook. Keep good records. Demand payment from the customer for the partial payment due. If that fails, file a lawsuit against him. (Of course, you may want to consider first when it is better to maintain an ongoing business relationship with him).
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Mark S. Guralnick, Esq.