Help regarding certification check in KUWAIT by KSE

I am applying for jobs in Kuwait.

My FIL ( Father in Law) is helping me to look for jobs and most of the places where he took my CV, the agency asked him to send the scan copies of certificate for the post engineer as NOC from KSE is required.
The background check of the certificates is only for the post of engineers with NBA accredited colleges and universities.

My doubt is will the background check will be done right away by job consultancy or after I land a job.
Awaiting a positive response.

Thanks and Regards,

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