Other mistake: In the paper file regarding Project Blackbriar Jason Bourne's bloodtype is noted as A+, but on David Webb's dogtags it's O-. Since David Webb is his real identity, O- must be his real blood type. If Bourne was injured and known to have blood type A+ (as it is stated in the docs), the person treating him would believe he was capable of receiving A+, A-, O+ and O-. However, since his real blood type is O-, he is compatible with type O- exclusively. So this would mean a 75% chance of receiving the wrong blood type in an emergency.
Jacob La Cour
31st Dec 2008
The Bourne Ultimatum (2007)
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Suggested correction: This is not a movie mistake. Documents made for a new identity would have details changed to mislead. Moreover, if he is wounded in the field and needs a transfusion, no-one is going to be searching for blood type on files, they'd use plasma, O - or do a test on the spot.