> For the complete documentation index, see [llms.txt](https://apidocs.arionbanki.is/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://apidocs.arionbanki.is/b2b-2013-schema/b2b-services/b2b-payment-service/known-issues-and-unavailable-functionality.md).

# Known issues and unavailable functionality

1. It is not possible to send more than one SMS message or email per payment in batch.
2. The approval process is implemented for batch payments, but not for single payments. (For more information on the approval process, see chapters 3.8 and 4.4.)
3. Foreign payments are not implemented. It is not possible to transfer between currency accounts (account types 36 and 38), nor is it possible to pay claims in foreign currency. This includes single payments and batch payments.
4. In batch payments, the functionality of withdrawing one payment for each individual payment in a batch (using IsOneToMany = false in the *Payments* (6.3) class) is not fully implemented. This will work if there are no errors, but if errors occur then they will not be visible in the response. Therefore, we recommend using IsOneToMany = true for all batch payments.
5. It is not possible to do a partial payment of a claim when using batch payments (using IsDeposit = true in the *claims* (6.3.5) class. However, it is implemented for single payments.
6. The function *GetPaymentResult* (6.1) for single payments is not implemented. However, the payment result is always returned when doing single payments with the *DoPayment* (6.1) function.
7. For batch receipts, the due date is not returned for claim payments (DueDate value in the *ClaimInfo* (6.7.4) class.