Final answer:
A physician's illegible signature on a prescription is an example of an illegible signature, which can pose problems in verifying authenticity and understanding instructions.
Step-by-step explanation:
A physician's illegible signature on a prescription is an example of an illegible signature. This means that the signature is difficult to read or decipher. It can pose a problem when it comes to verifying the authenticity of the prescription or understanding the specific instructions provided.
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