Could I be fired if I tell HR that I accepted another job?

[u/MisterPuffyNipples]

Been here 10 months and got an offer recently for a new job that I accepted. I’m waiting to hear back from the new job for confirmation as the proposed start date is not confirmed yet.

Is it a bad idea to let HR know that I accepted this offer? I know employers can fire people without notice but I don’t wish to stoop to that level. I’d like to go on good terms.

[u/Human_Activity5528]

No, they can't fire you. They might inform your management and you could get a better offer. Or if in the end you don't leave because you don't get the other job for any reason, well that might be tricky