WHOLESALERS: How can I stop the end buyer from cutting me out?

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I have a seller who has 10 discounted properties. I have 1 of his properties under contract(so of course, his name will appear on the purchase agreement that I assign to the end buyer). Once the end buyer sees the seller's name on the purchase agreeement, they could easily google him and contact him directly, thus cutting me out of future deals. Is there any way to stop the end buyer from knowing the seller's name?