Political parties have been criticised by the Electoral Commission for being late to declare £696,965 in donations.
The Conservatives reported £637,069 in the final quarter of last year which should have been revealed to officials in an earlier accounting period.
The Lib Dems, Labour, UKIP and the Greens also made late declarations. The commission said it was "disappointed".
Meanwhile, the Tories received more than twice as much in donations as Labour during the last quarter of 2009.
The Conservatives reported gifts of £10.48m while Labour said it had gathered £4.96m and the Lib Dems £1.06m.
The overall donations to parties were almost £17.1m, the third highest figure in history.
In the previous period, from July to September, the Conservatives received £5.27m, Labour £3.05m and the Lib Dems £816,663.
'Plenty of time'
The commission's chief executive, Peter Wardle, was critical of the reporting of donations during the last three months of 2009 which should have been revealed earlier.
Of the £696,965 figure, the Lib Dems were responsible for £29,126, UKIP for £14,635, the Green Party for £10,000 and Labour for £6,135.
Mr Wardle said: "We are extremely disappointed with the very high number, and value, of late reported donations, especially from the Conservative Party.
"it is important that all parties get back to full compliance and transparency ahead of the general election"
Peter Wardle, Electoral Comission
"The Liberal Democrats and United Kingdom Independence Party also had a high number of late reported donations received by accounting units.
"As the general election approaches, it's especially important that voters get all the information, on time, about how political parties are funded.
"Parties have had plenty of time to get systems in place and up to now we had seen the value of late-reported donations decreasing.
"That's why this quarter's results are disappointing, and it is important that all parties get back to full compliance and transparency ahead of the general election."
Mr Wardle added: "We have had a particularly high level of late-reported donations this quarter from the Conservative Party head office. They have told us that this was the result of computer problems.
"The Electoral Commission has met party officers, who have set out their plans to address these problems and return to timely reporting."
During the last quarter of 2009, the Co-operative Party received £204,735, the UK Independence Party £197,151, the Green Party £89,183 and the Scottish National Party £26,111.
The other amounts were: £20,000 for the Christian Party; £15,000 for the New Party; £11,617 for Plaid Cymru; £8,973 for Mums 4 Justice; £8,332 for East Herts People; £3,457 for Mebyon Kernow; and £3,415 for the Christian Peoples Alliance.
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