In What to do after I signed a blank sheet of paper given to me by my manager?, a distressed individual (B) has signed a blank piece of paper and given it to an adversary (A).
A has openly stated to B that her intention is to use this paper to create a forgery, making it look like the contents have been signed in a normal fashion by B.
Imagine the worst case scenario where A does make the forgery, nobody believes B, and the case ends up in court. Using current forensic methods, could one prove that the contents of the letter were written to it later than the signature?
I know that one can date the age of various items, however, I am unsure if such methods are precise enough to be reliable here.
Does it matter if:
- A writes the letter five minutes, one day, one month or one year after the signature was made?
- The text on the document is written by laser printer, ink printer, typewriter, ballpoint pen, other pen, et cetera?