A happy marriage

For you who didn't hear the news yet: last week I signed the contract for my new apartment! For now no news yet about the new place, but as soon as I move in I'll promise / warn you I will flood you with information and pictures that will make you jealous. For now, I want to tell you a different story: After signing the contract, I suddenly share a bank-account. This is not because the apartment comes with a wife. No, suddenly I share an account with my landlord...
Apparently, there's a whole banking industry that accommodates the safe storage of deposits.

And the great thing about these accounts: they are just like in a traditional marriage! I'm providing the money and the significant other is deciding when I can touch the money.

I've been thinking for a description of this system in one word, but for the moment only the word "Swiss" comes to mind...