According to his own filings with the Federal Election Commission the answer to that question appears to be "multiple times."
In a letter dated March 16, 2012 from the Federal Election commission to the Romney Campaign treasurer, Darrell Crate, the FEC states the following with regard to the January, 2012 Campaign Finance Report:
- Schedule A-P of your report (see attached) discloses a contribution from an individual(s) who has a mailing address outside of the United States of America. Please be advised that 2 U.S.C. §441e(a) and 11 CFR §110.20 prohibit foreign nationals from making contributions in connection with any election for political office or in connection with any primary election, convention, or caucus held to select candidates for any political office.
- Schedule A-P of your report discloses one or more contributions that appear to exceed the limits set forth in the Act (see attached). The Commission notes your additional explanation regarding the committee's corrective action taken for some of these contributions.
An individual or a political committee other than an authorized committee or a qualified multi-candidate committee may not make a contribution(s) to a candidate for federal office in excess of $2,500 per election. An authorized committee may not make a contribution(s) to a candidate for federal office in
excess of $2,000 per election. A qualified multi-candidate committee and all affiliated committees may not make a contribution(s) to a candidate for federal office in excess of $5,000 per election. The term "contribution" includes any
gift, subscription, loan, advance, or deposit of money or anything of value made by any person for the purpose of influencing any election for federal office. (2 U.S.C. § 441a(a) and (f); 11 CFR §§ 110.1(b), (e) and (k), and 02.13(c))
The excessive campaign contributions issue has, according to records from the Federal Election Commission, been a "problem" for the Romney campaign since at least 2007 when the FEC sent the Romney Campaign a 26 page letter requesting clarification which included the following paragraph:
- The acceptance of excessive contributions is a serious problem. Again, the committee's procedures for processing contributions should be examined and corrected in order to avoid this problem. Although the Commission may take further legal action, prompt action by you to refund, redesignate, and/or reattribute of the excessive amount will be taken into consideration.
You can see all of the campaign finance reports, amendments and requests for clarification on the Federal Election Commission page for the Romney Campaign.