Generally, a letter addressed to yourself is required as proof that you live at your address... I have to say I never heard the likes that you are now required to bring mail from other's living in the house.... I would think that those people's mail is their property.... very odd indeed. I'd write to the Superintendent CWO who is over this CWO and ask that person to clarify in writing why you are being asked to furnish the HSE with other peoples mail, this mail is not your property, and for what purpose....