Volunteering England's has conducted research on 94 organisations and found that only 33% of respondents said that they 'fully understood' which of their volunteers would need to be registered with the authority.
27% of organisations surveyed also said they weren't sure whether the schemem would mean that some of their activities would have to be stopped or cancelled.
56% of respondents thought the overall impact of the scheme would be 'increased bureaucracy, and 52% believed that the scheme would make it 'harder to recruit volunteers'.