回复：谢谢,非常遗憾的是,我中文也不好,我觉得这种信类似于公文,应该

No special format for that.

Just tell them what happened and what are you looking for and what you want to them to do. Be concise and provide all related information. Using certified mail to send your letter.

If you can come up with a draft (Chinese is ok). I can do translation for you.

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