This is a Legion of Merit Degree Certificate granted to Dr. Robert Neville used in the 2008 Will Smith sci-fi film I Am Legend.
The certificate was used to decorate Dr. Robert Neville's (Will Smith) office.
It can be easily screen seen thanks to the upper ribbon pattern and unique light-colored lower seal at bottom this Certificate uses. As only a dozen of certificates of all kind (medical mainly but some related to the Army too) were made, this can be considered a "one of a kind".
The certificate is from the United States Army, and has Neville listed as "1st Lt Robert Neville". Comes framed behind a FX glass in a real wood frame (intentional blurring on some parts has been applied to avoid faithful replication).
COA: Prop Store of London
Image 2: Will Smith as Dr. Robert Neville being attacked by the mutant vampire boss in his office. The Certificate can easily be recognized.