Hi mf1
I think it must be fairly common for people to bring patchy evidence of their income before the courts.
How do judges respond where a person says their income is €x but there is a suggestion this is understated.
Unless the supporting paperwork is rubbish, Judges look for proof from the person alleging that there is more. It is a common cry in family law matters: S/he has loads of money! Loads of it!
And the response is - show us where the loads of money is. Show us any evidence, anything solid.
Where a good solicitor/ accountant comes in is looking at the overall picture - ages, backgrounds, job status, life style, claiming welfare, bank/visa statements and, in some circumstances, engaging a private detective.
These cases also go through Case Progression where all of these issues can be raised.
The OP's queries are very cloak and dagger- and also quite specific in terms of the figures.
What a Judge won't do is accept allegations and make orders without really good reason and , if , as I suspect, this is a lay litigant, their ability to present a cogent case is in question based on the posts to date.
mf