The envelope with return receipt presumably contained a script version of "The Great Dictator" that was intentionally kept wax-sealed. It was a legal trick to protect against copyright violation: once returned to sender, the package was preserved perfectly wax-sealed to prove it had not been modified. R. F. is presumably Rachel Ford, Chaplin's secretary.

Signed ms. (original)
Author and adressee have the same address: "Chaplin Studio, 1416, n. La Brea Avenue, Los Angeles, Calif.". Receipt signed by Alfred Reeves. - Postal stamps with place and date of dispatch "West Calif., Aug. 3 1939", place and date of receipt "Los Angeles, Calif., Aug. 4 1939" and registration number "252035". - Blue pen ms. note "Nov. 73. R.F. purposed did not open this which she supposed was the G.D. script" and typed note "Registration receipt herein" on headed letter.
Los Angeles
Charles Chaplin Film Corporation, 1416 North La Brea Avenue, Hollywood, California
Los Angeles
1 letter card ; 8x13 cm. + 1 envelope (10x17 cm.)