措辞: 不要直接承认任何错误或责任。用词要谨慎,比如: "We obtained the image in good faith from Unsplash.com, which represents its images as free for commercial use under the Unsplash License. We kindly request you provide definitive proof of your exclusive copyright ownership and evidence that this specific image was not licensed via Unsplash." (我们是基于诚信从 Unsplash.com 获取的图片,该网站声明其图片根据 Unsplash 许可免费用于商业用途。我们恳请您提供您拥有独家版权的明确证据,以及该特定图片未通过 Unsplash 授权的证据。)
可以尝试 无责和解 (Nuisance Settlement):回复表示,虽然我们坚信没有侵权,但为了避免进一步的麻烦和时间成本,愿意支付一笔极小的“滋扰费”(比如 50-100 刀)来解决此事,但前提是对方必须签署协议,确认收到款项后放弃所有追诉权利,并且此付款不代表承认任何侵权行为 (Payment is made without admission of liability)。把价格压到最低,恶心他一下。