Probably not. except for the degree to which you may be able to explain the written/oral statemnet in a way that does not render it untrue.
*** I am not an attorney and am not in any way offering legal advice. You should consult a licensed attorney before taking any action with respect to this matter. (Kinda like ask your LOR before acting on any halachic info you get in the CR) ***
Who is signing it? if its only himself then its not the same but if a different beis din signed that they heard a testimony then that is the same as an oath.