# Cancellation of meter readings from LF — View MSB-MELO The LF or NB transmits the cancellation to the MSB of the metering location that was assigned to the metering location at the time of the reading of the meter reading to be cancelled. ## Process flow from the perspective of the MSB (MSB-MELO) \nSystem diagram: Stornierung von Zählerständen vom LF — view of MSB\n\n\nCustomer backend system\n\nMACO APP · MSB (Messlokat…\n\nMarket partner\n\n\n\n1. Stornierung\n\nLF\n\nAS4\n13006\n\nAPERAK check: Z33\n\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Stornierung von Zählerständen vom LF — view of MSB\n\n\nBackend (customer)\n\n\nMACO APP · MSB (Messlokat…\n\n\nLF\n\n\n1. Stornierung\nAS4 · PI 13006\n\nCreate transaction\nCreate process data\n"} titel="MSB-MELO" /> ## Process steps ### Cancellation
**Check identifiers** - [13006](/en/schnittstellen/202604/pruefi/MSCONS/PI_13006) — Meter reading value cancellation · AS4
**Flow**
  1. Message from **LF** · AS4
  2. **APERAK checks** - `13006` → `Z33`
  3. **Write endpoint** - Transaction created — [Create process data](/en/api/202604/backend-schreiben-msb/createprocessdata#prozessdaten-erstellen) `POST /createProcessData` Try it out Creates a new transaction in the backend with the data of the incoming message.
## Process information Wording of the consolidated version, profile ch. 2.9.2.1, p. 62.
  1. ### Preconditions - The MSB of the metering location knows the metering location. - As part of a reading for kME without RLM or mME, the LF or NB has transmitted a self-recorded meter reading or a meter reading from a customer reading to the MSB of the metering location. - The LF or NB identifies a need for cancellation of the meter reading it transmitted to the MSB of the metering location.
  2. ### Results If the meter reading to be cancelled has already been transmitted by the MSB of the metering location to the MSB of the market location and the cancellation is plausible, this meter reading must be cancelled by the MSB of the metering location at the MSB of the market location.
  3. ### Further requirements If the meter reading previously transmitted by the LF or NB was transmitted by the MSB of the market location, this meter reading remains valid until the MSB of the market location cancels it towards LF and NB.
  4. ### First message **LF** sends “Cancellation” (step 1). From here on, it is the turn of the party involved on this page.
  5. ### Objective The LF or NB has cancelled the meter reading transmitted to the MSB of the metering location.
## 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-Teil2-stornierung-von-zaehlerstaenden-vom-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 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)