Acknowledgement of Receiving, it means your application was checked and it is complete and had been assigned to an officer, who will soon will start working on your application
you need to tell details of what it means by - "never received AOR". did he never get an email? it may be have been possible that he may have been in AOR status, but the email may have gone to spam folder. or maybe his email was incorrect in the form, so it never went to the right address or something.