Yes you have trigered Identity verification,once I have similar situation for US extension...US don't validate every registration but they do it randomly or if you triger it..they call it data quality verification process , do you have different names and countries for Admin/tech/registrant...As I said It happen to me only once with US extension and I have to ask user to verify his identity as registrant...make sure you are the inside their registration policy when fill data for registrant/tech/admin,openSRS has verification page that can be customized..not sure for namecheap.