Meanwhile, I've received my card and the card of my wife was mailed. However, there is no tracking number for her card. Is the tracking number optional? On my case, I had a tracking number for the delivery.
I entered in US at the end of February , and paid the fee on the same day. Now the status is 'card is being produced'. My wife's status is still 'fee received' despite the fact that we entered at the same time.