A sum of money is said to be payable when a person is under an obliga- tion to pay it. "Payable" may therefore signify an obligation to pay at a future time, but, when used without qualification, "payable" means that the debt is payable at once, as opposed to "owing." Sweet. And see First Nat. Bank v. Greenville Nat. Bank, 84 Tex. 40. 19 S. W. 334; Easton v. Hyde, 13 Minn. 01 (Gil. 83).