Typically, banks, credit unions, mortgage brokers, and credit card companies are required to make such verification as part of the loan approval process.
The only verification these sites do is of a credit card number claiming that the American courts have ruled possession of a credit card to be sufficient proof of adulthood.
Tech Eye writer Tamlin Magee has checked out the verification process of the app, which required a credit or debit card and scanned photo of a passport, driving license or birth certificate.