The Supreme Court of the United States has held that a state statute requiring a tenant to post a double-bond before appealing an adverse eviction decision violates the equal protection clause.
Lindsey v. Normet, 405 U.S. 56 (1972).
C. T. Shaffer,
Landlord-Tenant - Eviction Proceedings - Appeal Bond,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol11/iss3/11