What does Jewish Law say about Identity Theft?
Identity theft would be prohibited, at the very least, under the classification of geneivas daas–making somebody think something of me that isn’t true. Identity theft is perhaps the most extreme form of this theft, in which others are made to believe a false identity.
Naturally enough, classical texts of Jewish Law don’t discuss the question. Even without a formal source, it would be prohibited as being unscrupulous and immoral.