Due to the way in which we account for and reconcile our input costs, in some cases we may apply specific billing and payment terms to different charges. The majority of services rendered including receipting, storage, pick/pack and rework are invoiced weekly in arrears with payment collected within 7 days by Direct Debit. However, some shipping services may be provided on prepaid terms, whereby charges are decremented from a credit balance as they are confirmed by the carrier. This process is described in detail below and necessitated by volumetric adjustments and surcharges that may be levied by carriers, but can only be identified upon completion of our monthly reconciliation process.