Effective March 18, 2018, USCIS will no longer accept power of attorney signatures on forms from petitioners and applicants seeking immigration benefits.
For forms filed by a corporation or other legal entity, an authorized person who is employed by the petitioner must sign.
This is important because if a form is filed with a faulty signature, USCIS may reject the form without offering a chance to fix the problem.
Power of attorney signatures are only authorized for children under 14 years old and individuals with disabilities.