If you had a signed letter that GS was willing to loan you $43 billion, you'd get taken seriously too. If you want to bid on a house, you'll need a signed lette

If you had a signed letter that GS was willing to loan you $43 billion, you'd get taken seriously too. If you want to bid on a house, you'll need a signed letter promising a loan of (house price) on it from a bank to be taken seriously (or cash reserves)