Confirm if a person is still at an address via Royal Mail
If you want to know if a person still lives at an address, then you can send a "signed for" letter via Royal Mail.
This allows you to check the signature online, or check if it was returned or rejected.
It will easily tell you if the person is still a resident at the address.
In addition if you do not want to print a letter, grab an envelope, stamp etc. then you can get Pc2paper (click here) to do ti for you for a small extra fee. They will send you the tracking number. They can even print in colour or staple the papers together!
Hope this hack helps