When an image is watermarked by a third-party website such as an image gallery, wallpaper site, or an anime or gaming website displaying official art.

Third-party watermarks are disallowed on Danbooru. They are regarded as flaws that should be addressed by someone finding a watermark-free image and uploading it. Once one is uploaded, the image with the third-party watermark should be made a child post and flagged.

Sites such as Weibo which add the artist's username as a watermark should not be tagged third-party watermark except in cases of third-party sources.

This tag implicates third-party_edit (learn more).

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