Bill Shorten's union and his close ally Victorian Labor MP Cesar Melhem face the possibility of criminal charges including for allegedly receiving corrupt and secret commissions in questionable deals done with employers.

However, no criminal charges have been supported against Mr Shorten in submissions to the trade union royal commission by counsel assisting that were released on Friday night.

Opposition Leader Bill Shorten will confirm on Tuesday that Labor would seek to increase taxes on tobacco if elected next year. Credit:Eddie Jim

Construction giant Thiess John Holland faces possible charges over payments to the Australian Workers Union during construction of the $2.5 billion EastLink tollway in Melbourne's south-east

Counsel assisting the commission, Jeremy Stoljar, SC, found that criminal charges should be considered against former AWU secretary Mr Melhem over $100,000-a-year payments to the union, without the knowledge of members, for which false invoices were said to have been created.