A former American Apparel sales associate filed a lawsuit on Wednesday alleging she was sexually harassed by Dov Charney, the company’s unconventional chief executive and founder best known for promoting his American-made T-shirts and leggings in provocative ads that feature young women.

In an interview, Kimbra Lo, the former associate, said the harassment happened last December, seven months after she left American Apparel, when she went to Mr. Charney’s Los Angeles home to discuss being rehired as a photographer and model. Previously Ms. Lo, 19, worked in one of the company’s New York stores.

Her claim is part of a lawsuit filed in Los Angeles Superior Court that also named three other women — Alyssa Ferguson, Marissa Wilson and Tesa Lubans-Dehaven — who did not publicly disclose the nature of their complaints because they signed confidentiality agreements while employed at American Apparel. Eric Baum, the women’s lawyer, said he did not believe the agreements were enforceable. The suit seeks unspecified compensatory and punitive damages.

All American Apparel employees are required to sign arbitration and confidentiality agreements when they are hired, the company said.