Research carried out by the IRS Employment Review found that although the online recruitment market is booming, most employers are unhappy at the amount of unsuitable applications they receive.
More than 60% of the 200 organisations that told IRS they had introduced or increased online recruitment during 2003 said they received inappropriate responses from the adverts they placed.
IRS found that the problem was least apparent in the public sector - where 90% of organisations attempted to fill vacancies online - with the sector receiving the lowest percentage of unsuitable applications.
Eighty per cent of the employers surveyed used their own websites for online recruitment.
The Chartered Institute of Personnel and Development said there were advantages and disadvantages to web recruitment and advised companies to consider using both online and traditional methods to find staff.
Advantages of online recruitment include the potential for shorter recruitment cycle times, lower recruitment costs and being able to reach a wider range of job applicants.
The institute said the disadvantages of online recruitment were that it was not yet the first choice of a large percentage of job seekers and not all potential applicants had ready access to the internet.
Also, as the IRS survey found, the ease of applying for jobs online may lead to more unsuitable applications being received, which have to be screened out, cancelling out some of the savings the channel offered.