I will try to be specific. - I did receive this e mail: Dear XXXXX, Your Apple ID (XXXXXXX) was used to sign in to the Find My iPhone app on a new device. Date and Time: October 6, 2014, ...
There are services like https://udidregistrations.com where you can register you UDID and get Certificates and Provision profiles. Are they worth? What danger is there? Signing applications is real? ...