
Edit: I also tried the 'offline' verification method and same thing. Has anyone experienced this? I've done a google and steam search and there has been issues like this but only in regards to people getting random invalid keys responses when attempting to play multiplayer. I just want to play this game, but don't want to invalidate my ability for a steam refund due to playing longer than the alloted two hours.

But, I also never received a confirmation ticket email response back which is the norm when filing a ticket these days. I tried contacting support but I haven't heard back from them, I'm guessing because it's the weekend. I think we have Steam keys, but not Taleworlds keys.

So, I just picked up Warband during the steam sale and I was in game for awhile on and off and was finally prompted to validate my serial key with. For Mount & Blade: Warband on the PC, a GameFAQs message board topic titled 'The CD key/Product code'. The best place to get cheats, codes, cheat codes, walkthrough, guide, FAQ, unlockables, tricks, and secrets for Mount And Blade: With Fire And Sword for PC. After being told numerous times that my key was invalid now I get a 'Authorization Declined' message. The software just doesn't want to accept my key.

So, I just picked up Warband during the steam sale and I was in game for awhile on and off and was finally prompted to validate my serial key with the developers DRM request popup box. Mount And Blade Warband Serial Key 2018.
