Simple bond
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
At common law, a bond without penalty ; a bond for the payment of a definite sum of money to a named obligee on demand or on a day certain.
Burnside v. Wand, 170 Mo. 531, 71 S. W. 337, 62 L. It A. 427.