# Cancellation of meter readings from LF — View LF 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 LF \nSystem diagram: Stornierung von Zählerständen vom LF — view of LF\n\n\nCustomer backend system\n\nMACO APP · LF\n\nMarket partner\n\n\n\n1. Stornierung\n\nMSB (Messlokation)\n\nAS4\n13006\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Stornierung von Zählerständen vom LF — view of LF\n\n\nBackend (customer)\n\n\nMACO APP · LF\n\n\nMSB (Messlokation)\n\n\n1. Stornierung\nAS4 · PI 13006\n\nUpdate transaction\nUpdate process data\n"} titel="LF" /> ## Process steps ### Cancellation
**Check identifiers** - [13006](/en/schnittstellen/202610/pruefi/MSCONS/PI_13006) — Meter reading value cancellation · AS4
**Flow**
  1. Message to **MSB (metering location)** · AS4
  2. **Write endpoint** - Transaction updated — [Update process data](/en/api/202610/backend-schreiben-lf/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
## 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 The party involved on this page is itself the sender of: „Cancellation“ to **MSB (metering location)** (step 1).
  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 MSB-MELO](/en/prozessdoku/202610/MSB/WiM-Teil2-stornierung-von-zaehlerstaenden-vom-lf) — MSB at the metering 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 source does not yet name the event that triggers these steps. Applies to: [1](#schritt-1)