More than one in three people who signed up for Individual Learning Accounts (ILAs) were not even aware that they had an account, an Education and Skills Select Committee was told at the end of last week.
The Committee is investigating the ill-fated scheme, finally withdrawn by the Department for Education and Skills (DfES) in November, following revelations of widespread fraud and theft.
Millions of pounds of taxpayers' money, earmarked by the government for training, disappeared because of "woeful" computer security precautions, experts have claimed. The vast majority of the funds were supposed to pay for IT training.
York Consulting, hired by the government to conduct usability studies into the scheme, said it had asked 4,000 account holders between March and April last year about their ILAs, and found that a third were unaware that they were on the list.
A second study later in the year found that a quarter of the 650 ILA holders questioned had not received their grants.
The DfES is now working with consultants Cap Gemini Ernst and Young as independent assessors to find out what went wrong and, in particular, how security breaches were made.
Responding to questions from the Education and Skills Select Committee, John Healey, the minister responsible for adult skills, said he expected an interim report from the consultants to be published later this month.
Healey also admitted that the problems were likely to have seriously hindered the potential success of any replacement scheme.
"In designing any successor ILA scheme clearly there is a challenge in restoring and underwriting the confidence that learners and learning providers would have in any successor scheme and I am very conscious of that," he said.
Healey's words will come as little solace to training providers which have delivered training but have yet to be reimbursed by the DfES.
Claims from 136 training companies for a total of £11.3m are being held while complaints and concerns about the learning delivered are investigated, according to Healey.
Meanwhile 11 people have been charged with plotting to swindle money from the training scheme. They are among 35 people arrested last autumn by the National Crime Squad accused of conspiracy to obtain property by deception.
All are being bailed to appear at Northampton Magistrates Court on 19 February.
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