If you’re regularly engaging with a number of people who are exploring their gender, you might slip up – most people do, even trans folks themselves! If you misgender or deadname someone, give a quick apology and correction as soon as you catch yourself. If they point it out, do the same. Unless they need to discuss, it’s critical not to give too much time to the mistake. A lengthy apology or dwelling on your error can lead to the client feeling guilty or like they need to comfort you. Put extra attention towards validating their identity afterward.
"Hi Caleb, how are you doing? Oh, I'm sorry, Kayla! How are you, Kayla?"
"As her sis- sorry, as her sibling..."
"I just realized I used the wrong name for you in my email earlier - I'm so sorry about that! I'm going to [ACTION STEP, e.g. review and update name/info in all files], but let me know if there's another way I can support you. You are always welcome to correct me when I mess up!"