What is the combination for creating a mortgage in Little Alchemy 2?

In Little Alchemy 2, there is no direct combination to create a mortgage. The game does not include a "mortgage" as an element, so it cannot be crafted through any combination of items.

If you're looking for advanced or hidden elements, I recommend focusing on other complex recipes like life, humans, or technology, which are achievable in the game. Let me know if you'd like help with any of those!