One of the ways to scale against deepfaked is to ensure three or more step variations when asked for information from people regardless of knowing such person before.

For instance, even if you did me a mail official or non-official. If you have my WhatsApp number I will still chat you up or give you a call on the demand.

Or I ask indirect questions about your demands. Like, "oh, your mail did not come in on time" Or I just make a quick chat around popular topics before hitting for the subject of the mail. "Ohh, Whats is up with you. Did you see the march yesterday, maybe I should not approve your request in your mail since we lost the game"

When it comes with money and very critical information, no urgency. What could be urgent by the way.

Plus I do not entertain offers from people have not had facial interactions with. Even if it means a seconds video call.