In Boyd v. Diversified Financial Systems, 1 S.W.3d 888, 890 (Tex. App.--Dallas 1999, no pet.) the appellate court affirmed the trial court's conclusion that the assignee owned the guaranty. In that case the guaranty was in the FDIC's file and was transferred to the plaintiff who presented the original guaranty at trial. See id. The loan sale agreement conveyed all rights of the FDIC under any collateral documents. See Boyd, 1 S.W.3d at 892-93. The Boyd court held that the facts presented were sufficient to establish the assignee's ownership of a guaranty. See id. at 893.