Apprehension of immigration fine before returning to the UAE

My brother went to Dubai on a visit visa and applied for a work visa and he got his work permit, but he came back to India during his visit visa (before work permit start) and never gone back.

His employer cancelled his visa and we have the documents (The employer is one of our relatives, he didn't report anything wrong to immigration).

Recently, my brother applied for a visit visa and he got rejected and then we informed the employer and they cleared from Immigration. Now, we reapplied for the visit visa and we got it.

My question is , although we got the visa, our fear is maybe my brother gets fine when he comes to Dubai because he never informed immigration that he is not coming back to Dubai for work (we have the proper work permit cancellation document and visit visa).

What should we do?