debitum in praesenti

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
DEBITUM IN PRAESENTI, SOLVENDUM IN FUTURO. A debt due at present, to be paid 
in future. There is a difference between debt payable now and one payable at 
a future time. On the former an action may be brought, on the latter no 
action lies until it becomes due. See Due; Owing; and 13 Pet. 494; 11 Mass. 
493. 
    

[email protected]