The right to due process guaranteed by the Fifth and Fourteenth Amendments prohibits the exclusion of probative exculpatory evidence in criminal trials when exclusion of such evidence is unreasonable, arbitrary, or disproportionate.

50 U.S.C. app. § 581(2) (A signature on a certificate of service is prima facie evidence of its contents and of the authority of the signer to issue the certificate.).Federal Rule of Evidence of 902(10) and comparable State rules provide that any signature, document, or other matter is self-authenticating -- i.e., requires no further evidence of authenticity to be admissible in evidence -- if an applicable statute provides that the signature, document, or other matter is presumptively authentic or if an applicable statute provides that the signature, document, or other matter is prima facie evidence of its own authenticity.

United States v. Meacham, 115 F.3d 1488, 1492 (10th Cir. 1997) (upholding trial court's admission of witness's testimony about accused's prior act of molesting two of his stepdaughters where the court, "in ruling on the admissibility of this evidence, focused on the intent and weighed the prejudicial...In a jurisdiction that authorizes the admission of evidence of another sexual assault by a criminal defendant who is on trial for sexual assault, the trial court can exclude the evidence of another sexual assault or assaults if the trial court finds that the harm or potential harm of such evidence of another sexual assault or assaults substantially outweighs the probative value of the evidence of the other assault or assaults.

Sherman v. United States, 356 U.S. 369, 373-376 (1958) (reversing conviction for the sale of narcotics and remanding to the trial court with instructions to dismiss the indictment because the defense of entrapment was established as a matter of law and the accused was merely induced by the government...A subjective entrapment defense makes an accused's criminal liability contingent on a finding of the accused's predisposition or the accused's lack of predisposition to commit the crime charged and since criminal predisposition is a character trait, the defense of subjective entrapment makes accused's character an element of either a defense or a criminal charge, evidence of accused's criminal predisposition -- including evidence in the form of reputation, opinion, and evidence of specific instances of accused's conduct -- is not barred by the rule against the use of a person's character to show the person's conduct.