Increasing the order value would exceed the credit granted by Klarna, resulting in rejection.
If a customer has chosen to use the invoice or part payment option in Klarna, it is not possible to add additional products to their order. This limitation exists because Klarna conducts a credit check on the customer to assess the risk of not getting paid. By allowing customers to increase the order value, it could potentially exceed the credit limit granted by Klarna, which would result in the rejection of the additional products.
To address this issue, you have the option to cancel the order in the Merchant Center. By doing so, you can kindly request the customer to place a new order with the desired additional products. This way, the customer can still benefit from the flexibility of Klarna's invoice or part payment option, while also being able to include the additional items they initially wanted to purchase.
For more comprehensive information and answers to any other questions you may have about Klarna, we recommend referring to the FAQ section found here. It provides detailed explanations and guidance on various Klarna features, payment options, and customer queries.