If it already happened
Someone is using my design on Redbubble
A Redbubble listing is using your Etsy photos. Do these three things before you pay anyone who emails you offering to handle it.
Save the page. Copy the listing link from the address bar, take screenshots, and write down the date. One link covers every product made from that listing. A search-results link slows them down. Your original Etsy listing, and the files you uploaded, are the proof the photos are yours.
Report it on Redbubble's own form. You have to be the rights holder or someone they authorized. The form is help.redbubble.com Notice and Takedown Report. It does not ask you to sign in first. The username field is only if you already have a Redbubble account. Paste each listing link, and say the photo is in the image. If you have a long list of listing links, their form says you can send that list to dmca@redbubble.com. Temu, SHEIN, Amazon, eBay, AliExpress, Walmart, TikTok Shop, Shopify stores, DHgate, Pinterest, and other Etsy shops have their own forms. Use those, not a random email.
If Etsy removed your listing because the copy showed up first, write Etsy and show them your original files and the date you published.
If it was Temu, start here. If it was SHEIN, start here. If it was Amazon, start here. If it was eBay, start here. If it was AliExpress, start here. If it was Walmart, start here. If it was TikTok Shop, start here. If it was a Shopify store, start here. If it was DHgate, start here. If it was Pinterest, start here. If it was Society6, start here. If it was another Etsy shop, start here. Want to see if one listing's main photo turns up somewhere else? Check it free. No account. If you want us to keep looking, the first 14 days are free, up to 5 listings, no card.