How do you safely transfer all money out of Treasury Direct?

My Mother’s TD account is currently locked with $300K in it. I sent in the FS 5444 form in last month. I called today and they said they would expedite the processing because she has Cancer now and needs it.

They said all the money is currently in her “C of I” account, which I already assumed.

When the account is unlocked, would it be safe to do the “Redeem from C of I” option for the full $300K? Or should she buy a 4-week Treasury Bill funded from “C of I” and make the destination her Primary Bank?

I don’t know if pulling all that money out at once by redeeming “C of I” would trigger another “suspicious activity”.

I would appreciate hearing some opinions. Thank you.