Some Brands do not require a sign-off process and some do. Those that do can pre-approve your company to make it easier to get started.
To find which ones that are ready to go (either no sign-off needed or pre-approved),
firstly go to your brands menu item.
You can find your "ready" to go brands in the available tab by refining by "ready".
Open the brand and click the Add Brand button.
Choose your financial relationship and click "Add Brand". Note that if it says "Request Brand" then this will not get set-up straight away.
As long as you select Monies on account then the brand will have been added to the "Your Brands" tab and you are ready to trade.