I notified the clerk about this, about Sims 2 also. So then, I started observing my game and I realized that it was produced in 2008. I answered saying that Origin owns older games than The Sims 1 (SimCity 2000, Theme Hospital.), and the clerk was unable to explain the availablity of these games. In the begining I thought I would be successfull in this process, until the moment when the clerk said that the registration wouldn't be possible because the game is very old. So I started a chat in US Origin (I'm brazilian) and asked for help to register the game in my account.
I tried to register the game in my Origin Account, and as I imagined, the serial was not valid. Recently I've purchased The Sims 1 Complete Collection and I got really upset when I realized tha EA is being so neglect with the most successfull game that became this franchise so big.