My ex withholds notice required by decree ie, notice of dr. visits, then lies and claims she left message. Gmail solution?

Q: Ex refuses to provide advanced notice required by decree. She later says "I left message, not sure why you did not get it" - eg, notice of Dr. visits. Could I hire escrow service to set up gmail account with google voice number, transferring email and calls to my personal email/phone, and - HERE IS THE KEY - contract with escrow service to keep the password secret and not delete any calls/emails. That way the Gmail account can be used to prove the negative - that no call or email was in fact made? Escrow agent could provide affidavits as needed along with print-out of call log/in-box for proof no call/message was made. If so, would a certified ltter to ex stating "this is the sole email and phone you should use to contact me" be effective in teeing up persuasive violation petition?

A: David's Answer: I'm not sure I understand the part about keeping the password secret, but I otherwise agree with your strategy. Or you could just have the order read that confirmations should be sent via e-mail in the first place. - David Bliven, Westchester Family Law attorney (www.blivenlaw.net)