In order for a factoring company to make an advance on an invoice the work must be completed and accepted by their client’s customer. Invoice factoring works on the premise that the factor can appear in court to collect on an unpaid invoice without the assistance of their client. In other words the evidence that the work has been done, received and accepted is overwhelmingly clear that the verdict would be obvious to anyone reviewing the case. The factoring company is looking to avoid any grey area regarding the invoice that would inhibit getting payment. This is the business model, when it comes to accounts receivable factoring that works best for all involved.