Secret gifts in OK mean that no one knows who the sender is, even to the addressee (unlike private gifts, when only the recipient knows who sent this gift). Unfortunately for the recipient (and fortunately for the sender), it is impossible to find out who sent secret gifts on OK. If you have received a secret gift, you can only guess who it came from. On the other hand, if you use this function yourself, you can be confident that you will remain 100% anonymous.