<p>Snowball, my recommendation is that you ship each item separately, and in a book or card. In other words, one contains a credit card, one contains an ATM card, etc. Yes, please use the shipping envelope provided by the shipper - it will sail through whereas a personal envelope will be subject to greater scrutiny. </p>
<p>I am not aware that you are required to list with precision what each item is. “greeting card” or “book” should do it (provided that is what you are shipping).</p>