The relationship offered on taking an appeal, in which the appellant binds himself to pay for damages and prices if he doesn't prosecute the attraction with effect. Omaha Hotel Co. v. Kountze, 107 U. S. 378, 2 Sup. Ct. 911, 27 L. Ed. 009.
Guaranty of repayment of damages (plus predicted price of attraction) examined by an appellate judge. Posted by a losing party (that is attractive a reduced judge's wisdom), it's cashed in the event that attraction is unsuccessful. An appeal bond serves to discourage frivolous appeals that waste the courts' time (see misuse of procedure).