Webcrawler

Greetings,

A friend of mine recently confided to me that he had been working for a company other
than the one that holds his H-1B. While working for his sponsoring company, he also
works 3 nights a week at this other company. They used to pay him cash for his work.
But since last month, they have started paying him thru a cheque because they didn't
have that much cash. Now he is scared to deposit those cheques in his bank account
because he fears that the IRS or the INS might come to know.

Those cheques have a narration [in the 'FOR' line] that says something like "Payment
for Work done @x $ per hr."

Now my question is: can he get into trouble because of this?

I advised him to stop working for that company. But he still needs to do something
about those cheques. Is it ok to deposit those in a checking A/C. Will the IRS come
to know and inform INS? The amounts are not very big and not very small either (about
$1500 a month).

Thanks for any advice, WebCrawler