Cum par delictum est duorum, semper oneratur petitor, et melior habetur possessoris causa

Dictionary: 
Ballentine's Law Dictionary

When two parties are equally at fault, the claimant always has the burden and the one in possession has the better cause.

Author: 
James A. Ballentine
Publisher: 
The Bobbs-Merrill Company
Year Published: 
1916
Genre: 
Law Dictionary