What do the status' draft, awaiting payment, and paid mean?

These are the status stages of the invoice.

‍Draft

These are invoices that have yet to be made factorable and sent to a broker. Typically this is because they don't have all the required documents, or the documents are being processed to be sent shortly.
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‍Awaiting payment

These are invoices that are unpaid and are awaiting payment from the broker.

‍Paid

These are invoices that have been paid by the broker.