# Billing of metering point operation towards the LF — LF view The process comprises the exchange of the information supporting the billing of metering point operation. ## Process flow from the perspective of the LF \nSystem diagram: Abrechnung Messstellenbetrieb gegenüber dem LF — view of LF\n\n\nCustomer backend system\n\nMACO APP · LF\n\nMarket partner\n\n\n\n1. Rechnung\n(Messstellenbetrieb)\n\nMSB (entspricht MSB a…\n\nAS4\n31009\n\nAPERAK check: Z10\n\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n\nEBD check: E_0519, E_0210\nE_0519 — Rechnung der\nLeistungen des Preisblatts A\nprüfen\nE_0210 — Rechnung\nverarbeiten\n\n\nProcess trigger received\n\n\nSTART_VERSAND_ANTWORT\n_NNA\n\nAPI\n\n2. Antwort\n\n\nMSB (entspricht MSB a…\n\nAS4\n33001, 33003, 33004\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n3. Storno der ursprünglichen\nRechnung\n\n\nMSB (entspricht MSB a…\n\nAS4\n31004\n\nAPERAK check: Z33\n\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\nProcess trigger received\n\n\nSTART_VERSAND_ANTWORT\n_NNA\n\nAPI\n\n4. Antwort\n\n\nMSB (entspricht MSB a…\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 LF\n\n\nBackend (customer)\n\n\nMACO APP · LF\n\n\nMSB (entspricht MSB am Ob…\n\n\n1. Rechnung (Messstellenbetrieb)\nAS4 · PI 31009\n\nCreate transaction\nCreate process data\n\nSTART_VERSAND_ANTWORT_NNA\nTrigger event\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\nSTART_VERSAND_ANTWORT_NNA\nTrigger event\n\n4. Antwort\nAS4 · PI 33001, 33002 · E_0243\nE_0243 — Storno verarbeiten\n\nUpdate transaction\nUpdate process data\n"} titel="LF" /> ## Process steps ### Invoice (metering point operation)
**Check identifiers** - [31009](/en/schnittstellen/202604/pruefi/INVOIC/PI_31009) — MSB invoice · AS4
**Flow**
  1. Message from **MSB (corresponds to MSB at the market location object)** · AS4
  2. **APERAK checks** - `31009` → `Z10` — APERAK check: Is location known ?
  3. **Write endpoint** - Transaction created — [Create process data](/en/api/202604/backend-schreiben-lf/createprocessdata#prozessdaten-erstellen) `POST /createProcessData` Try it out Creates a new transaction in the backend with the data of the incoming message.
  4. **Decision tree** - `31009` → [E_0519](/en/referenz/202604/ebd/E_0519) — Check invoice for the services of price sheet A - `31009` → [E_0210](/en/referenz/202604/ebd/E_0210) — Process invoice
### 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. **Prozessauslöser** [`START_VERSAND_ANTWORT_NNA`](/en/api/202604/ausloeser-lf/start-versand-antwort-nna) \",\n \"avisTyp\": \"\",\n \"positionen\": [\n \"\"\n ],\n \"zuZahlen\": {\n \"waehrung\": \"\",\n \"wert\": \"\"\n }\n }\n ]\n },\n \"transaktionsdaten\": {\n \"absender\": {\n \"rollencodenummer\": \"\"\n },\n \"empfaenger\": {\n \"marktrolle\": \"\",\n \"rollencodenummer\": \"\"\n },\n \"kategorie\": \"\",\n \"nachrichtendatum\": \"\",\n \"pruefidentifikator\": \"\",\n \"sparte\": \"\"\n },\n \"zusatzdaten\": {\n \"eventname\": \"START_VERSAND_ANTWORT_NNA\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren The backend triggers this step with this event.
  2. Message to **MSB (corresponds to MSB at the market location object)** · AS4
    **Response per decision tree** - `33003` → [E_0210](/en/referenz/202604/ebd/E_0210) · LF · Process invoice
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-lf/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
### Cancellation of the original invoice
**Check identifiers** - [31004](/en/schnittstellen/202604/pruefi/INVOIC/PI_31004) — Cancellation invoice · AS4
**Flow**
  1. Message from **MSB (corresponds to MSB at the market location object)** · AS4
  2. **APERAK checks** - `31004` → `Z33` — APERAK check: Is referenced message known ?
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-lf/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend with the data of the incoming message.
### 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. **Prozessauslöser** [`START_VERSAND_ANTWORT_NNA`](/en/api/202604/ausloeser-lf/start-versand-antwort-nna) \",\n \"avisTyp\": \"\",\n \"positionen\": [\n \"\"\n ],\n \"zuZahlen\": {\n \"waehrung\": \"\",\n \"wert\": \"\"\n }\n }\n ]\n },\n \"transaktionsdaten\": {\n \"absender\": {\n \"rollencodenummer\": \"\"\n },\n \"empfaenger\": {\n \"marktrolle\": \"\",\n \"rollencodenummer\": \"\"\n },\n \"kategorie\": \"\",\n \"nachrichtendatum\": \"\",\n \"pruefidentifikator\": \"\",\n \"sparte\": \"\"\n },\n \"zusatzdaten\": {\n \"eventname\": \"START_VERSAND_ANTWORT_NNA\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren The backend triggers this step with this event.
  2. Message to **MSB (corresponds to MSB at the market location object)** · AS4
    **Response per decision tree** - `33002` → [E_0243](/en/referenz/202604/ebd/E_0243) · LF · Process cancellation
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-lf/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
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 **MSB (corresponds to MSB at the market location object)** sends “Invoice (metering point operation)” (step 1). From this point on, the party on this page is next to act.
  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 MSB-MALO](/en/prozessdoku/202604/MSB/WiM-Teil1-abrechnung-messstellenbetrieb-gegenueber-dem-lf) — MSB at the market location object · market role MSB *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 connector table lists no write call for these steps. Derived from the process flow: the process begins for the own role with their message, so the transaction is created. Applies to: [1](#schritt-1) 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)