A power of attorney is a legal document that a natural person or a legal person entrusts others to exercise their legitimate rights and interests on their behalf, and the client needs to show his client when exercising his functions and powers. A natural person only needs to sign or authorize by fingerprint, and a legal person needs the authorization of the official seal of the legal person.

Sign whatever you want, and there will be more in writing. You can't publish it without signing it.

If hired, they will inform you to sign, don't worry. The author has the copyright and the right to use it.