Does Leanpub issue 1099 forms for US Taxes?

We're a Canadian startup, and we don't issue US 1099s.
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Our suggestion is to just use your PayPal history of royalty payments as the record for tax purposes, since that shows exactly what you were paid, and when.  (This is one of the many reasons that we pay royalties via PayPal, is that they keep very good records of when payments were made.)