What does Jewish Law say about Identity Theft?
Answer:
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.