If you have cash on hand and not from a bank, then yes. It's untraceable. Do it. But if you donate money to her from any kind of account, your accounts will get frozen too. And that includes Avengers accounts, which they are now watching. So my hands are tied here, too. If they wanted to, they could shut down the Tower.
For now. Temporary. This is temporary.
The lawyers think they have a good case to throw this out as false accusation. It's just a matter of sworn statements from Asgard and Jane, and pushing it through the courts.