ST: How long till I can say that the game I traded for is pretty much safe?

You're fine. Stop being as paranoid as onevoltz

I think if you find where that person lives, sit outside his house for a few months and sort of glance through their windows at night you'll get a good feeling on how safe you are. Check back frequently and if possible, hire a private investigator.

Never

You're fine.

When I send people game codes and I give them a year to redeem them. If they aren't redeemed (and they didn't pay me a lot more than I paid for the code) I'll redeem it myself. But honestly, if you're holding onto a code for over a year and you never use it, you had it coming.

EDIT: I usually sell codes for 25 to 75 percent cheaper than the steam client, I usually only make a few dollars for each code, sometimes I make only 40 cents.

No gamble in this one.

You can't be safe unless the trader is alive. But there is a way. You have to find his real name and photo, then you can write his name into your Death Note.
Well, at least that's how it working for me.

I cut off all keys that I sold from .txt-file where I save them and doesn't keep them after trade

With all those scammers, hackers, carders and what not you just can't be safe. Trading is always a risk and it always will be.

I had FIFA 14 disappear from my Origin account after 2 weeks, but the guy who I traded for it gave me back my tf2 keys, said he bought the game from an Asian site and he didn't seem too surprised it got revoked from my Origin account.

anyway, always keep screenshots of high value trades in case something like this happens to you.

thanks guys, I guess i'm fine, just very paranoid.

btw I recorded every trade including the part where i activated the keys.