"These websites cannot legally verify the details provided by consumers looking to buy fake pay slips as the only official parties who would prove salary information - the payroll departments of their employer and the HMRC - are bound by the Data Protection Act," the IPP website confirms.
The websites in question have countered the IPP's claim that they are knowingly supplying Britons with payslips in order for them to commit fraud by insisting that there are a number of legitimate reasons for another copy of a payslip to be requested.
These include burglary, fire and flood - all of which could have resulted in the loss or damage of the original copy.
However, Maurice Cheng, CEO of IPP, is still sceptical.
"To provide a payslip to someone where you have no proof of their earnings has to be deemed fraud," he said.
The IPP is concerned that the practise will lead to increased consumer debt - and possibly a rise in repossessions - as higher interest rates put fraudsters under heightened financial pressure, especially as in many cases they are not earning enough to cover the original cost of the mortgage.
Julian King, director of National Homebuyers, says: "Of equal concern is the legal aspect of increasing consumer debt."
National Homebuyers is the UK's leading quick purchase property firm, which in part helps homeowners release equity in their property when they find themselves in financial difficulty. King says: "Lenders are now arranging eight-times mortgages which could spell disaster for home affordability.
"We are already working with thousands who cannot meet their monthly mortgage payments and offer a lifeline in the shape of a quick sale of their property.
"Homeowners failing to meet their repayment plan should consider selling their property to us, we complete quickly, offer cash for the property and even arrange for the vendor to remain in their home."
National Homebuyers' sell and rent back proposition is advertised as "an alternative to equity release." Further information can be found at www.nationalhomebuyers.co.uk/
