That can entail working directly with other officers or by myself, going through business records such as sales invoices, till rolls and purchase records, and producing a report.
To do this, the business borrows a percentage of the value of its sales ledger from a finance company, effectively using the unpaid sales invoices as collateral for the borrowing.
They purchase businesses' sales invoices -- or accounts receivable -- at a discount, providing them instant short-term financing at effective interest rates of about 30%.
Traditional proof of purchase systems required the consumer to send some portion of the packaging, as defined by the product's manufacturer, or the sales invoice.