The Further Education Funding Council has issued a list of methods being used by fraudsters since it alerted colleges to risks last autumn.
One method reported to the FEFC by a south-west college involved a fake standing order. The college was alerted by its bank to the order, which was for more than Pounds 1,000 and to be paid monthly.
And a private training provider asked a college to back its bid for cash from the European Social Fund for a scheme found to involve non-existent students.
Colleges have also been warned that private training providers have claimed cash from colleges for work and billed trainees. A fourth scam involves a mailshot containing an invoice for goods which have not been ordered or received.
Colleges are also still getting faxes from Nigeria asking for their bank account details.