Manuel Ruperto v. Manuel Kosca

Summary

This 1913 Supreme Court case involved a business sale dispute where Manuel Kosca purchased M. Kosca & Co. partnership business for P9,073.72 in monthly installments, with Sixto Mendoza as bondsman. After defaulting on the second payment, Kosca attempted to transfer obligations to Jose Infante through a conditional contract requiring two bondsmen. When Infante failed to provide the required security, the transfer contract was not perfected, leaving Kosca liable under the original agreement. The Supreme Court applied Civil Code provisions on conditional obligations and contract formation, affirming that imperfect contracts cannot discharge existing valid obligations. The decision established important precedent on contract substitution requirements and conditional obligation fulfillment in Philippine contract law.