Maria was accused of libel. While Maria was on the witness stand, the prosecution asked her to write her name and to sign on a piece of paper…

The question

Maria was accused of libel. While Maria was on the witness stand, the prosecution asked her to write her name and to sign on a piece of paper, apparently to prove that she authored the libelous material. Maria objected as writing and signing her name would violate her right against self-incrimination. Was Maria’s objection proper?

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