Law / Obtaining National VISA - Poland insurance requirements [9]

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Poland's National Visa: The Experience letter?

I have query on National Visa - D about the required document, it is mentioned to provide the Experience letter.

I have all the experience letters, except from my current one, as I am in notice period, no experience letter issued yet - what should I do for it ??

Do I need to put the cover letter as well, as its not mentioned as the required docs ?