Third time's the charm, right? Just mailed in my application again this morning, will be received tomorrow. Included a letter of explanation with our 2015 NoA explaining it's the most recent one we have available, included the Use of a Representative form since we put my mailing address in Canada, and put my name and date of birth on the back of all our relationship proof photos (something else we had forgotten last time, not sure if it would have caused an issue or not). And... of course... went through the checklist about a thousand times making sure everything was signed and accounted for. Fingers crossed - I can't handle another return!