Taunton childminder Sheila Griffith contacted Ofsted in August, after finding that she and other accredited local childminders had been excluded from the Ofsted website.
She said, 'I was told that integrated childminders doing the Foundation Stage should not be on there because there was no facility to remove personal details.'
When Ofsted decided to publish inspection reports, it was agreed that the personal details of childminders, such as name, telephone number and address, would be withheld.
Ofsted said, 'At present our system does not enable us to anonymise reports of childminders where we have carried out an integrated inspection.'
With no inspection report on the website, Ms Griffith said, prospective customers are unable to check the childminders' credentials.
'We wondered why we were having fewer enquiries from parents,' she said.
'One of my colleagues has been waiting a year for her report to appear.'
A spokesman for Ofsted said that they hope to correct the situation 'during the next month'.
But Liz Bayram, chief executive of the National Childminding Association, said that she was aware of this 'technical fault' and she understood that 'it was a short-term delay'.
She said, 'While we recognise that this glitch only affects a very small number of the 70,000 registered childminders in England, they are among the best, being accredited to deliver education as part of an approved NCMA Children Come First network. The apparent unavailability of any reports means that parents are unaware of the full range of services these childminders provide.'
She added, 'The NCMA is continuing to press Ofsted on this issue.'
