What I like to do is copy
support at escrow dot com
on the email where I am supplying the buyer with the transfer auth code.
Don’t forget to also login to the escrow and click to indicate that you’re transferring the domain via this method.
Finally, if you’re worried about the transaction, keep screen shots to prove that you’ve made the transfer - before and after WhoIs, the email from your registrar confirming the transfer, etc.