Dubious and deceitful disclosure by applicants for home loans may be common if the findings of a survey by investment bank UBS are on the money.In results labelled "disturbing" by the researchers, an online survey of 1228 people found only 72 per cent self-described the details they supplied when requesting a home loan as "completely factual and accurate".UBS said 21 per cent agreed the details in their application were "mostly factual and accurate" while another five per cent said they were "partially factual and accurate". The remaining two per cent of respondents said they "would rather not say".Another highlight centres on one long-running controversy in the mortgage market."The level of factual inaccuracy in mortgage applications was highly skewed to customers who secured finance via a mortgage broker," UBS said.Lead analyst Jonathan Mott, along with four colleagues, wrote in a report last week that "32 per cent of customers who secured their mortgage via brokers stated they misrepresented parts of their mortgage documentation compared to 22 per cent of customers who used bank proprietary distribution. "In each category of factual accuracy (with the exception of 'would rather not say') there was a statistically significantly higher level of misrepresentation for customers who secured their mortgage via a broker," the report said.It said 13 per cent of respondents who secured their mortgage via a bank and misrepresented their documentation "stated their banker suggested they over/under represent" their income or asset details.For borrowers who "secured their mortgage via a broker and misrepresented their application, 41 per cent of them stated they had done this on the suggestion of their broker."This topic barely emerged at last week's parliamentary exchanges with the CEOs of big banks.Greens MP Adam Bandt pressed the point with Brian Hartzer, first recycling specific allegations of inflating someone's income and then asking "are there any other instances within Westpac where people who have been applying for a loan have had their incomes altered or inflated?"?Hartzer responded: "I cannot say that it has never happened, but not to my knowledge."The findings from the UBS survey echo the conclusions of John Hempton, chief investment officer of Bronte Capital, and Jonathan Tepper, an economist and founder of Variant Perception, following a study tour of Sydney's western suburbs earlier this year."Underwriting standards are poor in banks. The regulators trust the Big Four banks' statistics, but we've seen that underwriting standards are much worse than advertised," Hempton and Tepper said in analysis released in February."In our due diligence, we told mortgage brokers and bank managers that we required a 95 per cent loan-to-value mortgage at ten times our gross household income to buy our dream house, and we were consistently told it was not a problem at all. "All we needed were two payslips and mortgage insurance. We asked if the bank would call our employer, and both reputable and disreputable brokers said banks rarely verified payslips."The more recent UBS survey may add weight to a thesis aired for some years by critics of the banking industry such