VIII. Juan sued Roberto for specific performance. Roberto knew that Juan was going to file the case so he went out of town and temporarily stayed in another city to avoid service of summons. Juan engaged the services of Sheriff Matinik to serve the summons but when the latter went to the residence of Roberto, he was told by the caretaker thereof that his employer no longer resides at the house. The caretaker is a high school graduate and is the godson of Roberto. Believing the caretaker's story to be true, Sheriff Matinik left a copy of the summons and complaint with the caretaker. Was there a valid substituted service of summons? Discuss the requirements for a valid service of summons. (5%)