Evidence whose relevance depends on some other fact or condition

26 U.S.C. § 6064 (Signatures on tax returns are presumed authentic.).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. Koen, 982 F.2d 1101, 1110 (7th Cir. 1992) (upholding trial court's admission of witnesses' testimony about accused's business dealings because, even though the accused does not dispute that this evidence establishes his indebtedness and his motive, still such evidence completed the...Another act, wrong, or crime is admissible to show a motive for some alleged conduct on a particular occasion.

Fed. R. Evid. 801(d).Statements exempted from the hearsay rule are not made inadmissible by the hearsay rule even when such statements are offered to prove the truth of the matter asserted and even when such statements thus otherwise satisfy the definition of hearsay provided by Federal Rules of Evidence 801(a) and 801(c) or by similar State rules.