We're excited to announce that we've fully migrated the Xbox Forums to their new home, here on the Microsoft Community forums!
As of today, going to forums.xbox.com will redirect you here to the Xbox area of the Community forums. We've moved all of your existing threads over so you can continue and start conversations with the new forums experience.
We sincerely appreciate the feedback you have provided over this transition and can't wait for you to check out the new Xbox Forums!
I'm not exactly sure what it is you're asking, sorry. Without jumping to conclusions, it almost sounds like you've committed marketplace theft by "giving" your friend access to your account and its transactions.
As for playing them without a disc.... if you've purchased the game digitally, then no, you don't need a disc. If you used to play them on a disc, then yes, you'd still need the disc.