The Federal Election Commission may have found more than a thousand mistakes in the latest financial filing by Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE’s presidential campaign, according to a new report.

The FEC determined that Trump’s campaign accepted about 1,100 donations — totaling approximately $1.3 million — that may be in violation of various campaign finance laws, CNN said Monday.

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The commission sent Timothy Jost, the campaign's treasurer, a letter Sunday seeking clarification of last month's financial filings.

The FEC’s message focused on two main concerns: whether Trump’s campaign accepted contributions from organizations not properly registered with the commission and whether donors giving to the Republican’s campaign exceeded legal donation limits.

“If any apparently prohibited contribution in question was incompletely or incorrectly disclosed, you should amend your original report with clarifying information,” it states. "In addition, please clarify whether the contribution(s) received from the referenced organization(s) is permissible.

“If any apparently excessive contribution in question was incompletely or incorrectly disclosed, you must amend your original report with the clarifying information.”

The FEC’s letter demands the Trump campaign refund any donations from unregistered organizations or that surpassed legal donating limits.

Trump’s campaign and a joint fundraising committee reported raising $67 million in its last FEC filing of the election cycle. The haul came during the first 19 days of October and included $35 million from small-dollar contributions.

Trump’s campaign announced earlier this month it had brought in more than $100 million in small-dollar donations from 1.6 million donors overall in October.

Small-dollar donations typically refer to contributions of $200 or less, meaning the Trump campaign generated impressive totals during the last month of the 2016 race.

Trump, now the president-elect, frequently said his personal fortune freed him from the power of wealthy special interests on the campaign trail.