你的信显然在邮寄过程中丢失了，在你写完两年后才投递。
Your letter has clearly been lost in the post and has just been delivered two years after it was written.
物品在邮寄过程中如有损坏，可向邮局提出索赔。
If the goods were damaged in the post, you can put in a claim to the post office.
问题：我想我的佣金付款支票已经在邮寄过程中丢失，能为我重发一份么？
Question:I think my commission payment check was lost in the mail. Can you reissue a new check?
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