20 C.F.R. § 345.113

(a) Each contribution report on Form DC-1 shall be signed by hand by:

(1) The individual, if the employer is an individual;

(2) The president, vice president, or other duly authorized officer, if the employer is a corporation; or

(3) A responsible and duly authorized member or officer having knowledge of its affairs if the employer is a partnership or other unincorporated organization.

(b) The Form DC-1 may be filed electronically through the Board's authorized agent. If filed electronically, no further authentication is required.