I called up the electric company to cancel service and had this conversation:
ec rep: "Thank you for calling <the electric company>, how may I help you today?"
me: "Hi! I'd like to cancel my service."
rep: "Certainly ma'am! I have your account information here. What is the name on the account?"
me: "<male name>"
rep: "That's the name I have. Can you put <male name> on the phone?"
me: "I'm <male name>."
rep: "Ummmmm...."
me: "I'm transgender."
rep: "Ummmmm...."
me: (switching to male voice) "I'm transgender"
rep: "Okay, now you sound like a girl trying to be a guy. I'm not sure I can do this."
me: (panicking and jumping for joy at the same time) "Is there anything you can do to verify my identity?"
rep: "Let me transfer you to my supervisor..."
(a simialar conversation ensues with the supervisor)
At the end of the conversation:
supervisor: "Ma'am I not so sure about this. Against my better judgement, I'll allow you to cancel this account. I'm just afraid you might be an ex trying to cancel <male name>'s account or something like that."
I guess I don't have to worry about my voice anymore.