This program will help you write a letter that formally requests the money you are owed. This is called a Demand Letter.Let them know how much they owe you and why you think they owe you the money. The City of Oakland has a standard claim form that can be used for your convenience. Who Must File Form 700. Apply for a New Business Tax Certificate online or at the Business Tax Office. Refundable business registration fee plus special fees. Blank Application Forms. The below forms may be dropped at a secure drop box, at one of our offices, during regular business hours, am to pm. If you are eligible to apply for a grant, you can submit a Letter of Interest.