A work that was uploaded to Danbooru by the person who commissioned it.
If the work was received privately from the artist rather than being publicly posted, or that it is different from version publicly posted by the artist (such as having higher resolution, lack of censorship, watermark, etc.), then the source may be left blank, left as the filename or description of where the commission was delivered, or linked to the "public" version of the work. Non-web source tag may be applicable if the artist have not posted the work online.
If the work was posted to another site by the commissioner, please use second-party source instead.