The sale of the debt transfers ownership of the debt to the postman, the factor having all the rights attached to the claims.   As a result, the debt becomes the factor`s asset, and the postman obtains the right to obtain payments made by the debtor for the amount of the invoice, and he is free to wager or exchange the asset without credit without any undue constraint or restriction.   As a general rule, the debtor is informed of the sale of the debt, and the postman invoices the debtor and makes all the recoveries; However, the non-notification factor by which the customer (seller) withdraws accounts sold to the postman as a factor agent also intervenes. The agreement is generally confidential because the debtor is not informed of the assignment of the debt and the seller of the debt withdraws the debt in the name of the postman.  If the factor transfers the debt “without recourse,” the factor (buyer of the debt) must bear the loss if the debtor does not pay the amount of the invoice.  If the postman transfers the debt “with recourse,” the postman has the right to recover the amount of the unpaid invoice from the seller.  However, all shipments of goods that could reduce the amount of the invoice to be recovered are generally the responsibility of the seller and the factor is generally retained for the payment of the seller for a portion of the debt sold (the “holdback-value of the postman”) in order to cover returns related to the claims in question until the right to return the property is lowered. It is the most common international factoring system and consists of four parts: the exporter, the importer, the export factor in the exporting country and the import factor in the importing country. On the other hand, the non-recourse factor cannot resort to the company if the debt proves unrecoverable.
A number of factoring agreements are possible depending on the agreement between the selling company and the postman. In the event of reverse factoring or supply chain financing, the buyer sells his debts to the postman. In this way, the buyer secures the financing of the invoice and the supplier gets a better interest rate.  (d) it allows selling companies to transfer the risk of non-payment, default or non-performing debt to factoring non-recourse to factoring companies. The financing of the invoice is the generic name for all debt financing products. It can be defined as “financing against unpaid sales invoices,” although this does not quite cover the service as shown above. Under this roof come the most deactivated services (financing through a collection service) and invoice rebates (financing only). Simply put, it is the product hierarchy, so we would not consider the interest rate or the financing of invoices as factoring types. This goes against many definitions that you can read on the Internet.
Many companies have varying cash flows. It could be relatively large over one period and relatively small over another period.