# Billing of metering point operation towards the LF — MSB-MALO view The process comprises the exchange of the information supporting the billing of metering point operation. ## Process flow from the perspective of the MSB (MSB-MALO) \nSystem diagram: Abrechnung Messstellenbetrieb gegenüber dem LF — view of MSB\n\n\nCustomer backend system\n\nMACO APP · MSB (entsprich…\n\nMarket partner\n\n\n\n1. Rechnung\n(Messstellenbetrieb)\n\nLF\n\nAS4\n31009\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n2. Antwort\n\n\nLF\n\nAS4\n33001, 33003, 33004\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\nLoad data for processing\n\n\n2 read APIs called\n\nAPI\nlisted at the step\n\n3. Storno der ursprünglichen\nRechnung\n\n\nLF\n\nAS4\n31004\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n4. Antwort\n\n\nLF\n\nAS4\n33001, 33002\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Abrechnung Messstellenbetrieb gegenüber dem LF — view of MSB\n\n\nBackend (customer)\n\n\nMACO APP · MSB (entsprich…\n\n\nLF\n\n\n1. Rechnung (Messstellenbetrieb)\nAS4 · PI 31009\n\nUpdate transaction\nUpdate process data\n\n2. Antwort\nAS4 · PI 33001, 33003, 33004 · E_0210\nE_0210 — Rechnung verarbeiten\n\nUpdate transaction\nUpdate process data\n\n3. Storno der ursprünglichen Rechnung\nAS4 · PI 31004\n\nUpdate transaction\nUpdate process data\n\n4. Antwort\nAS4 · PI 33001, 33002 · E_0243\nE_0243 — Storno verarbeiten\n\nUpdate transaction\nUpdate process data\n"} titel="MSB-MALO" /> ## Process steps ### Invoice (metering point operation)
**Check identifiers** - [31009](/en/schnittstellen/202604/pruefi/INVOIC/PI_31009) — MSB invoice · AS4
**Flow**
  1. Message to **LF** · AS4
  2. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-msb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
### Response
**Check identifiers** - [33001](/en/schnittstellen/202604/pruefi/REMADV/PI_33001) — Confirmation · AS4 - [33003](/en/schnittstellen/202604/pruefi/REMADV/PI_33003) — Electricity refusal header and total · AS4 - [33004](/en/schnittstellen/202604/pruefi/REMADV/PI_33004) — Electricity refusal line item · AS4
**Flow**
  1. Message from **LF** · AS4
    **Response per decision tree** - `33003` → [E_0210](/en/referenz/202604/ebd/E_0210) · LF · Process invoice
  2. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-msb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend with the data of the incoming message.
### Cancellation of the original invoice
**Check identifiers** - [31004](/en/schnittstellen/202604/pruefi/INVOIC/PI_31004) — Cancellation invoice · AS4
**Flow**
  1. **Load data for processing** - [Read market location](/en/api/202604/backend-lesen/getmarketlocationbasic#marktlokation-lesen) `GET /getMarketLocationBasic` Try it - `LESEN_RECHNUNG_BASIS`
  2. Message to **LF** · AS4
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-msb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
### Response
**Check identifiers** - [33001](/en/schnittstellen/202604/pruefi/REMADV/PI_33001) — Confirmation · AS4 - [33002](/en/schnittstellen/202604/pruefi/REMADV/PI_33002) — Refusal · AS4
**Flow**
  1. Message from **LF** · AS4
    **Response per decision tree** - `33002` → [E_0243](/en/referenz/202604/ebd/E_0243) · LF · Process cancellation
  2. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-msb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend with the data of the incoming message.
Decision trees of this process | EBD | Name | |---|---| | [E_0210](/referenz/202604/ebd/E_0210) | Process invoice | | [E_0243](/referenz/202604/ebd/E_0243) | Process cancellation |
## Process information Wording of the consolidated version, profile ch. 3.6.3.8.1, pp. 77–78.
  1. ### Preconditions A valid agreement on the billing of the metering point operation exists between MSB of the market location and LF. The LF is the payer for the metering point operation.
  2. ### Results The invoice for metering point operation has been paid by the LF.
  3. ### Error case #### Result in the error case The invoice for metering point operation is not paid by the LF. #### Error cases The LF has received an incorrect invoice (invoice recipient or invoice content incorrect).
  4. ### First message The party involved on this page is itself the sender of: „Invoice (metering point operation)“ to **LF** (step 1).
  5. ### Objective The MSB of the market location has received the charges for metering point operation from the LF.
## Other views of the process The same process through the eyes of the other parties involved: the same steps, each read from their point of view. - [View LF](/en/prozessdoku/202604/LF/WiM-Teil1-abrechnung-messstellenbetrieb-gegenueber-dem-lf) — LF *The steps are the **possible** messages of this process, not a sequence — the source lists neither conditions nor alternatives. The small box on the step names the own view on the left: with **←** it receives, with **→** it sends. Collapsed steps run between other market partners.* The source does not yet name the event that triggers these steps. Applies to: [1](#schritt-1) These read accesses are not listed in the API catalogue of this format version; the step therefore shows only their command, without address and without button. Applies to: [3](#schritt-3) The connector table lists no write call for these steps. Derived from the process flow: the own role was already involved in this process, so the transaction already exists. Applies to: [2](#schritt-2), [4](#schritt-4) For the check identifiers of these steps there is no test case in the test data set; the »Try it out« button of the write interface therefore offers no body. Applies to: [1](#schritt-1), [3](#schritt-3)