Dad dies. His adult daughter is an authorized user on his credit card, and Dad gave her permission to use the card for whatever she wanted. Dad happily paid the monthly bill. Dad dies and Daughter keeps using the card, thinking that she has always used it and thought she still could. Or, in many cases, she is the executor of his will and uses it to pay for bills or other expenses related to Dad’s final expenses. Permissible? Obviously (at least to me) not, but it happens frequently.
An authorized user’s use of a credit card after the primary account holder dies is illegal. Under state law, it is considered fraud, and is no different than finding a stranger’s credit card and using it. The authorized user could face jail and, or fines.
For instances where an executor who is an authorized user with good intentions uses the deceased’s credit card to pay bills, the end result—liability on the authorized user—might not change. Daughter/Executor cannot use Dad’s credit card after his death to pay any of his outstanding medical bills, credit card bills, utility bills, etc. Executors must pay expenses and other estate bills from assets of the estate. If there are no assets of the estate, then the estate is considered insolvent. Racking up the balance on a credit card of a deceased person, whatever the reason, will result in liability for those charges, and perhaps the entire card balance, on the authorized user, including (in this example) the executor.
If you are an authorized user on a credit card, notify the credit card company immediately upon the death of the primary cardholder. Using the primary cardholder’s credit card after death when you have no right to do so will likely have no good outcome.