Nats Fyi
 

The system NATS have of confirming account changes via email works well, until you want to change the email address itself and you no longer have access to the old email address. Then the confirmation promptly drops into a black hole and your account stays as it is.

I'm not sure what satisfactory alternative there is, but it would be excellent if NATS could come up with something (security question maybe?). With more hope than expectation I just filled in another support form. If it goes ignored too, it will be the fifth in the past 7 or 10 days...

there's an option to only allow changes manually through the sponsor, that might be an option?

Until NATS addresses the issue, you may want to contact the program managers directly. Those of us with admin access to our NATS programs can take care of you no problem. :thumbsup