| Installment type |  |
| Advance Advance installments must be invoiced and paid for by the customer before goods can be delivered. Correction - Advance A correction to an advance installment, which reverses the original installment amount. Normal Normal installments are invoiced before or at the delivery of goods. Correction - Normal A correction to a normal installment, which reverses the original installment amount. Guarantee Guarantee installments can only be invoiced after all the non-guarantee installments are invoiced and all the goods are delivered. Correction - Guarantee A correction to a guarantee installment, which reverses the original installment amount. |