Incorrect - If you use a TSA approved lock, it will NOT be cut-off. They have master keys to open them. And you will have a note inside stating it was inspected. If you would have a lock cut off, you could file a claim. To mail a suitcase, you can lock it and mail it. There's no reason you need to put it in a box. You will slap the mailing sticker on it however. But, depending on the weight, it might not be worth it.