Using his birth name, William Henry Pratt, Karloff assigns his life insurance policy as collateral. "For Value Received the undersigned hereby assign, transfer and set over to Citizens National Trust & Savings in Hollywood, 2g California...." "William Henry Pratt (known as Boris Karloff) of Beverly Hills, California...agrees to the conditions and revisions herein set forth...." On the lower portion of the page after all terms are articulated, Karloff signs, "William Henry Pratt. Known as Boris Karloff," above the words identifying "Insured or Owner."
Karloff emigrated to Canada in the early 1910's and began an acting career. It is at this time that Pratt became Boris Karloff though he never legally changed his name typically using the his stage and birth names in the manner found in or document. He was also a founding member of the Screen Actors Guild.