http://www.slate.com/articles/business/the_bills/2015/10/rental_security_deposits_in_the_u_s_make_no_sense_the_u_k_found_a_better.html

When Rent.com decided to take a look at the state of the American rental market a few years ago, its poll revealed that more than 1 in 4 respondents currently leasing their residences had lost security deposits to previous landlords. Why? We don’t know. I mean that literally. More than a third of landlords offered no explanation for refusing to return their tenants’ money.