I would buy either a big, big basket, (you can get them at Michael's) or a big Rubbermaid plastic bin, and when you are away, anything or everything, (mail and such), that your husband or children that are in the home, are unsure of, goes in that bin, even after he has looked at it. Don't let him throw any mail away until you have gone thru it. He can open it, but then it goes in the bin.
Put it by the door or somewhere where it is easily noticeable.
This way, you have one area where you can go thru as you have the time, rather than always looking thru your whole house, pockets, purses, etc.