I had a customer who deposiited a check ($3,000.00)in thier account. After a few days we realized the customer didnt endorse the check. The check was from a loan company requiring a signature to accept terms of the loan - Who is responsible for covering this? The customer claims she never received or cashed the check - I told her we have a deposit slip in the amount of the check. she said she didnt endorse the check and will not pay it - HELP PLEASE!!Any advice?

Yes read your post in Ask A Banker.

Thanks, but what if she has closed the account, which she did today, now what?

The proceeds were deposited into her account? Who withdrew them? If it wasn't her check, why did she take the money? Tell her these are the questions your attorney and the prosecutor will be asking and go after her.