Brokers can create endorsements to off-platform contracts. Once off-platform lines have been added to the off-platform contract, endorsements can be created against the firm order or signed versions of the contract.

Any carriers on Whitespace whose lines have been added to the off-platform contract will be able to access the off-platform contract and update their line references until the contract is signed. The endorsement can be shown to these carriers as normal, and underwriters can agree endorsements to off-platform contracts on Whitespace.