In India it is illegal for a person to have more than one job at a time. A relieving letter is issued by a company to an employee who has duly resigned from his said post, to be used as proof tofor future employers.
The relieving letter should be issued the same day when you’reyou are going to exit fromleave the company. If the company does not issue the relieving letter it means that your resignation is not accepted and you are still you arean employee of thethat company until the company issues the relieving letter.
Relieving letter only states formally that you have been relieved to ensure that a new employee has resigned from his previous company and he is not trying to dowork two jobs at the same time. This prevents people from taking a holiday to try out another company.
Most of companies are interested only in your most recent position, but some CMM level 5 companies require all of your relieving, experience, payslips for verification.
Companies like Infosys, TCS, CTS verifiyverify all the documents and also verify your educational qualification which includes your schooling and degree.
Background check practices in India vary significantly across different sectors, and even across different companies within the same sector, in the absence of anywithout defined principles, processes or laws. A comprehensive background check requires a prospective employer to validate a candidate’s educational qualifications, past employment records, work experience, criminal records and identity check, such as a passport, driving license or income tax registration number. An effective validation process also may involve contacting past employers and, former managers and supervisors.
Most organization would at-most do one level of verification which is the last/recentlatest, most recent relieving letter.
ThereIf you don't have the most recent relieving letter, there are greater chances of job application ignoringbeing dropped, regardless if you in your next job though beingare a potential candidate for the job if you don't have the recent/last as the present employer couldor not get. The employer has no way to know whether or not you werehave been relieved from thatyour last assignment &and that there are no pending engagements with themyour last employer.