Checking for AI use in hiring has become common. What matters is not declaring that AI was used but finding out what made it look so, and treating the candidate fairly.
The same result means something different for an assignment that banned AI tools and one that asked for disclosure. Stating the check criteria in the job posting removes much of the later dispute.
Design and photography portfolios are read with the image detectors and provenance signatures. A generating tool's record or signature is strong evidence; without one, read the detector result as a range. Work partly retouched with AI can be missed.
Text detection is in beta and flags a fair number of human texts, especially translated and short ones. Do not reject a candidate on a text result alone.
If a result raises doubts, ask the candidate to explain the process in the interview or to share drafts and original files. Inconclusive means no firm call can be made, so it should never count against anyone.
This is general guidance, not legal advice. A scan result is a probabilistic assessment, not proof.