At least four former senior White House advisers failed to file financial reports required by law after they left the White House this summer, McClatchy reports.

Former White Houe chief of Staff Reince Priebus, chief strategist Stephen Bannon and former deputy assistant to the president Sebastian Gorka are among those who reportedly failed to file the financial reports within the 30-day deadline.

Priebus filed his report this week, nearly four months after leaving the administration in late July, according to McClatchy.

A spokesman for Bannon told McClatchy that Bannon has filed, but did not offer the timing of when a filing was made. However, White House records do not show that Bannon has filed yet.

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Executive branch employees are required by federal law to file termination reports within 30 days of their departure if they have worked for more than 60 days. The reports include information on finances, employees' future employment plans and possible conflicts of interest.

According to McClatchy, a late filing is punishable by a $200 fee, and the attorney general could take civil or criminal action over failed filings.

Critics and ethics officials have expressed concern over the Trump administration's handling of government filings and transparency.

Kushner, for example, was fined by the Office of Government Ethics (OGE) for his late reporting of a financial transaction in his efforts to transfer management of his large number of businesses so he could serve in the White House.

Key members of the White House team also late to file disclosure statements included former chief of staff Reince Priebus and press secretary Sarah Huckabee Sanders.