How do you package and send cards to TPG's to keep them secure

[steve B]

That's way more involved that what I've done.
My first few went in toploaders,but were dropped off at a show for later grading.
The ones I mailed were sent in cardsavers, as that's what the card companies recommend.
I don't use card savers, so I had to save them up from ebay and card show purchases.

After that, cardboard stiffeners, wrapped in bubble wrap, and sent registered mail.