Does anyone know if there’s any instances where 2 ReserveServer codes could be the same? The Wiki states they remain valid indefinitely and for my use-case, I’m looking to create unique “places” for each player and I’d rather only have to set and save that code once but would run into conflict if 2 ever match.
Thanks in advance! 
Reserved server codes are designed to be unique. And you can join the same server with the code. If no reserved server with that code is running, it creates a fresh one with a fresh place. Otherwise, Roblox automatically closes them after all players leave.
If I remember correctly, the codes are more than 50 characters long, consisting of upper and lower case letters, and numbers. Which means 62 (26 letters* 2 + 10 numbers) possible characters on each of these 50+ places. I think the number is 55, so that makes 62^55, which equals to an ASTRONOMICAL NUMBER 6.8729654274 × 10^104. That’s more than 100 zeros!! More than Googol - Wikipedia.
Those should be the chances. For comparrison, the odds of winning Euro Jackpot are 1 in 139,838,160. So easy to win, right?
Thank you for this information! Based on that, I would imagine very highly unlikely to get 2 of the same even if stored indefinitely. I guess I could always add a preventative check externally as I store this to a database. Originally I planned on using CreatePlaceAsync, but the feature appears to be broken. 
Definitely!
Thanks again!
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