My 87 yr old father-in-law defaulted on two credit cards, with balances in excess of 15K. The banks wrote this off as bad debt and turned it over to collection agencies. Now my father-in-law is getting calls from the creditors threatening to freeze his bank accounts. Can they do that? His only income is from social security benefits and he needs all of that to get by on. I'm not sure what we can do about this? He was quoted 1500.00 to file bankrupcy...but is that his only option?