Her lack of response will count against her.
Unless... . she later rushes in, due date missed, claiming blah-blah-blah (she was out of the country, her mailman was on strike, her mailbox fell down, whatever) and finally submitting a late response. And probably they'll allow it. So much for final notices.
She is not a child, she is an adult. An adult is expected to be a responsible person and ought to suffer deserved consequences. How else will she learn there are limits?
... . Something we often say here, The misbehaving spouse seldom has consequences and the behaving spouse seldom gets credit.