The Joseph Smith Papers continues to identify and catalogue papers about the life of Joseph Smith. Their biographical entry for John Tanner has quite a few new entries. I've added links or images of the important items to John Tanner's FamilySearch page. Here's a promissory note that shows John Tanner's signature:
Here's a screen shot of the listed documents:
Here's a screen shot of the listed documents:
JS and 30 others, Promissory Note, Kirtland Township, Geauga Co., OH, to Holbrook & Ferme, [New York City, New York Co., NY], 1 Sept. 1837; handwriting of William Perkins; signatures of authors; two pages; Ohio Historical Society, Columbus, OH. The Joseph Smith Papers, https://www.josephsmithpapers.org/paper-summary/promissory-note-to-holbrook-ferme-1-september-1837-a/2.