Endorsement is what makes Itsme work.  You endorse your Itsme-things over to others, right here;  and they endorse their Itsme-things over to you in their Itsme-website endorsement table.  In general you make an endorsement right here, but you can also do it from your Itsme-mobile or anyplace you can get online.  You'll need your Itsme-mobile of course, to prove it's you.  You can endorse to others the right to endorse, and then some of your stuff appears in their endorsement table. 

In the table, you'll see that endorsees can be categorized:  family, relative, friend, house guest, associate, tradesperson, deliverer, anything you want, anytime:  the category then determines all their privileges with one simple attribute.  Endorsees don't have to be individuals; they can be groups or lists, like Acme Plumbing and Party guests.  Itsme-things can also be categorized and grouped, like the Taos condo below.  Endorsements can be very flexible, like: anytime, workdays, until midnight, <$50 twice a week.  A category like D's mom could mean she has endorsed her entire estate to you.  You can invent anything you want, depending on the application software you buy.  This endorsement table is very simple, just for demonstration.