House of Judicious Increase
From Dragon
One of the Great Houses of the Hon'eth Arcade; they specialize in banks, moneylenders, clerks, and casinos.
They are the principal brokers of large commercial transactions in the Twelve Kingdoms; both parties will deposit the money or goods, and the house will oversee the trade (for a fee). They will also provide letters verifying that particular amounts have been deposited in their coffers at a particular date.