Firstly what you should do is to reach out with the person and ask to delete it, if he rejects you can probably proof that the photo is yours: From the date posted, also when you go to the info of the photo there is all the detailed information about it. In the end you should report the person in the social media.

Wenn du entdeckst, dass jemand anderes deine Fotografien in sozialen Medien als seine eigenen ausgibt, solltest du umgehend handeln, um dein Urheberrecht zu wahren. Zuerst ist es wichtig, Beweise zu sichern. Mach Screenshots von den betreffenden Beiträgen und notiere alle relevanten Informationen. Kontaktiere danach die Person, die deine Bilder verwendet, und bitte sie höflich, das Material zu entfernen oder zumindest korrekt anzugeben, dass es von dir stammt. Wenn dies nicht fruchtet, kannst du eine formelle Beschwerde bei der betreffenden Plattform einreichen, um die unautorisierte Nutzung zu stoppen.

Primero que nada, exigiría ver los datos EXIF que posee. Algo a tener en cuenta como evidencia es ver quien la publicó primero.

Your Rights: Know, Embed, Assert, and Reinforce them Today we can establish ownership at the moment of image creation. Embed your rights, assert your rights and reinforce your rights for every photograph that you care about. You can record the rights you are retaining or waiving in the metadata, on websites, in social media etc.. Often people inadvertently overstep, so early on start with curious questions. When you have gathered your information consider whether it is worth the distraction, time and cost to pursue and enforce rights with potentially no monetary recovery. Decide and move forward with your best interests. In the end it is about the economics of a potentially protracted dispute.

If someone is falsely claiming your photography on social media, act swiftly to assert your ownership. Politely reach out to the individual or account, requesting they either remove the post or credit your work appropriately. If they don’t comply, report the infringement to the platform with evidence, like timestamps or the original files, to establish authorship. For future protection, watermark your images or use digital copyright management tools. Publicly sharing your portfolio with proper credits also reinforces your ownership and builds credibility. Explore more ways to protect your work at leepitts.pics

Seek Legal Counsel: If the infringement continues and the situation escalates, consider seeking the advice of a lawyer who specializes in intellectual property rights.