If you want to work in any foreign country, it is always a must that you have a working visa. Without proper documents, your employment in a foreign country is illegal

So for recruiters who offers employment in South Korea by giving applicants a religious visa should not be entertained

Applicants for overseas work have been warned against promises of employment in South Korea through the issuance of a religious visa. The POEA reported that they have received complaints that a number of Korean citizens have offered employment to Filipino applicants and then disappeared. The illegal recruiters who were identified as Cho Chang Kuy and Oh Gyuk Su apparently collected more than Php 7 million from their victims.