The Japanese Bankers Association released detailed guidelines Thursday listing the conditions under which bank depositors may not receive full compensation in the event that they lose money via bank-card thefts and forgeries.

According to the guidelines, it is possible that JBA member banks will refund only 75 percent of lost money when victims are known to have carried their bank cards together with their drivers' licenses, health insurance cards or passports.

These pieces of ID feature birth dates and other numbers customers may use for their PIN numbers.

If depositors are seen to have deliberately given third parties access to their PIN numbers, they will not receive any compensation, the guidelines say.

Thursday's announcement follows Diet approval in August of a bill that aims to protect depositors from losses sustained via cash-card thefts and forgeries. The law, which takes effect in February, requires financial institutions to compensate depositors in full for losses suffered via stolen or forged cash cards -- unless they can prove depositors were responsible for these losses.