Creating GiveAway with Steam keys NOT checked!?

Try contacting steam support to check whether the keys are used or not, they will figure it out for you. Else you will risk the chance of the key already being used and you'll have a not received on your profile (unless you won't mind). Trying to create puzzles with it works too, too bad if the key would be used in that case.

If you aren't 100% sure then it's probably best to just post them in this thread instead....

http://www.steamgifts.com/discussion/Zq0rb/drop-your-orphan-keys-here-thread-not-sure-if-key-got-used-or-desura-other-platform-keys-part2/search?page=5#0zH3SJ2

Otherwise you'd have to repurchase the game again for the winner if the key is used :o)

In case they aren't working, you can ask the support to delete the giveaway (be aware that you'll have to contact the winner and they have to agree to the deletion).

Hope I helped.

For some reason, which I don't remember why, those keys are shown to me

Are they from old bundles ? If yes, it's because the keys were automatically revealed when they disabled the OAuth system.

Thx guys for replies. Yes these are somewhat old bundles (HB 9 and 10).

I've heard you can write to HB support (people say they are super helpful) and they can check if the key was activated and to what account.
Just don't mention giveaways on SG (they don't like that) say instead that you'd like to surprise a few friends with games.

I already decided that I don't care if the key is used or not, I just made the giveaways and hoped for the best.
If you have couple keys for the same game, only do one giveaway with key you think is most likely used, but you'r not sure and if the winner says it's used then give the other key to him.

Would be great tho, if Steam would implement key checker, but then again that would take away a bit of the income from them.