It is odd that I didnt get a notification regarding assignment?
My sold put also expired ITM friday. Today is Saturday 1130 AM.
I still see the option in my account, but is zeroed out. And I see that the cash that was used as collateral has been freed up (but still avail in my account). I see no pending transactions.
For reference, when I sold covered calls and when they go expired. I do get a notification about it being expired Saurday around 2-3AM.