How did corrie find out about her family's release from prison? (based on the book the hiding place) a guard handed her a message. betsie told her. lieutenant rahms told her during his interrogation. during hitler's birthday, the guards left their posts, so prisoners passed messages to each other.

While Corrie is still a prisoner in the concentration camp called the Scheveningen, she founds out about her family member's release  from prison.

This happens during Hitler's birthday, the 20th of April. Because the guards of the camp were celebrating the birthday of their leader, the prisoners had the chance to exchange messages between each other, some of them containing valuable information about the outside world. It is because of these exchanges that Corrie finds out that Nollie, Peter,Pickwick, Tools and  Willem were all released from prison.

The answer is

During Hitler's birthday, the guards left their posts, so prisoners passed messages to each other.

Explanation: God Bless

the awenser wuold be slaves