Key legal question
Whether the supervisory authority could estimate the debtor's garnishable income rather than rely on his declared salary
Extracted holding
Yes. The authority may investigate the debtor's real economic situation and estimate income from relevant indices when the declared salary appears implausible.
Extracted reasoning
The office must not merely record declarations but must inquire into assets and income sources, including economic ownership. Where the debtor's status or declarations are not credible, the authority may rely on available indicators and, if necessary, on an estimate, especially when the debtor occupies a role comparable to an independent earner.