Sorry for your loss. Good of you to take on some of these lousy tasks. Usually, credit cards get cancelled upon death. Doing so will not let the account renew. The account suspends. Then 90 days later it deactivates and it's off the books.
Of course this only works if his own card was used here. If the card is shared (same number) then that can be worked around by logging into the credit card account to pause it. Call 18554public and enter his number to hear the balance and renewal date. The evening before that date, pause the payment card, then the next mid-day unpause it. That's assuming the widow can get into that credit card account to pause it.
