The answer is No, your new employer cannot check your previous EPF deductions by using your UAN number. But they can find your date of exit in your previous company. If you are mentioning fake salary details then you don’t need to worry about giving your previous UAN number to the new employer, but if you have mentioned wrong experience details then it is better to not give your UAN to the new employer.
Because when you join in a new job, then you need to fill UAN declaration form 11, on this form you need to mention your previous company PF details like your PF member id, UAN number and date of leaving.
Why Hiding Your Previous PF Details is Not a Good Idea
At present Aadhar number of the employee is mandatory to generate UAN number. So if you already had a UAN which was linked to your UAN, then it is not possible to generate new UAN.
And the second reason is if you keep on changing UAN numbers (not possible nowadays) then your EPF service period will break, which will hurt your monthly EPF pension amount after 58 years of your age.
Finally, any misrepresentation of previous job details will take away your peace of mind and they may hurt at any time. Now most companies made background verification very strict. So hiding your previous job details is not a good idea.