diff --git a/accession-monitoring/monitor_duplicate_clustering_accessions.nf b/accession-monitoring/monitor_duplicate_clustering_accessions.nf
new file mode 100644
index 00000000..04515e61
--- /dev/null
+++ b/accession-monitoring/monitor_duplicate_clustering_accessions.nf
@@ -0,0 +1,136 @@
+#!/usr/bin/env nextflow
+
+nextflow.enable.dsl=2
+
+def helpMessage() {
+    log.info"""
+    Extract rsids from the mongo database and check if they have duplicates
+
+    Inputs:
+            --mongodb_uri          Address of the mongodb server where the data can be found.
+            --output_dir           Directory where the list of discovered duplicate will be provided
+            --assembly_accession   Limit the search to rsids associated with specific assembly
+            --chunk_size           number of rsids processed in each chunk during the duplicate detection stage
+            --email_recipient      email address that should be contacted if duplicate RS are detected
+    """
+}
+
+params.mongodb_uri = null
+params.chunk_size = 1000000
+params.help = null
+
+// Show help message
+if (params.help) exit 0, helpMessage()
+
+// Test input
+if (!params.mongodb_uri ) {
+    if (!params.mongodb_uri) log.warn('Provide the mongodb uri line using --mongodb_uri')
+    if (!params.output_dir) log.warn('Provide the location for the output file containing the duplicates using --output_dir')
+    if (!params.email_recipient) log.warn('Provide the email address that should be contacted upon finding duplicates using --email_recipient')
+    exit 1, helpMessage()
+}
+
+
+process export_mongo_cluster_accessions {
+    label 'med_time', 'default_mem'
+
+    output:
+    path "dbsnp_rsid_output_file", optional: true, emit: dbsnp_rs_report_filename
+    path "eva_rsid_output_file", optional: true, emit: eva_rs_report_filename
+
+    script:
+    query = ""
+    if (params.assembly_accession){
+        query = """--query  '{"asm": "$params.assembly_accession"}'"""
+    }
+    """
+    mongoexport --uri $params.mongodb_uri $query --collection dbsnpClusteredVariantEntity --type=csv --fields accession -o dbsnp_rsid_output_file --noHeaderLine 2>&1
+    mongoexport --uri $params.mongodb_uri $query --collection clusteredVariantEntity --type=csv --fields accession -o eva_rsid_output_file --noHeaderLine 2>&1
+    """
+}
+
+
+process sort_unique_split_accessions {
+
+    label 'med_time', 'med_mem'
+
+    input:
+    path dbsnp_rsid
+    path eva_rsid
+
+    output:
+    path "accession_chunk-*", emit: accession_chunk
+
+    script:
+    """
+    set -o pipefail
+    cat $dbsnp_rsid $eva_rsid | sort -u -T . -S 2G | split -a 5 -d -l $params.chunk_size - accession_chunk-
+    """
+}
+
+
+
+process detect_duplicates_in_chunk {
+
+    label 'default_time', 'med_mem'
+
+    maxForks 10
+
+    input:
+    each path(accession_chunk)
+
+    output:
+    path "accession_chunk-*_duplicates", emit: duplicate_accession_chunk
+
+    script:
+    def duplicate_accession_chunk = accession_chunk + "_duplicates"
+    """
+    java -Xmx6G -jar $params.clustering_jar --spring.config.location=file:$params.clustering_properties \
+    --spring.batch.job.names=DUPLICATE_RS_ACC_QC_JOB --parameters.rsAccFile=$accession_chunk \
+    --parameters.duplicateRSAccFile=$duplicate_accession_chunk
+    """
+}
+
+
+process merge_duplicates_and_notify {
+
+    publishDir "$params.output_dir", overwrite: true, mode: "copy"
+
+    input:
+    path duplicate_accession_chunks
+
+    output:
+    path "rs_duplicate_accession_*", emit: rs_duplicate_accession
+
+    script:
+    """
+    TIMESTAMP=`date +\\%Y\\%m\\%d\\%H\\%M\\%S`
+    cat $duplicate_accession_chunks > rs_duplicate_accession_\$TIMESTAMP.out
+    NB_DUP=`wc -l <rs_duplicate_accession_\$TIMESTAMP.out`
+
+    if [[ \$NB_DUP -ge 1 ]]
+    then
+      cat > email <<- EOF
+    From: eva-noreply@ebi.ac.uk
+    To: $params.email_recipient
+    Subject: \$NB_DUP Duplicates RS accession detected \$TIMESTAMP
+    During the execution of monitor_duplicate_clustering_accessions.nf on \$TIMESTAMP,
+    \$NB_DUP were detected
+
+    Find the list of accession in
+    $params.output_dir/rs_duplicate_accession_\$TIMESTAMP.out
+    EOF
+      cat email | sendmail $params.email_recipient
+    fi
+    """
+
+}
+
+workflow {
+    main:
+        export_mongo_cluster_accessions()
+        sort_unique_split_accessions(export_mongo_cluster_accessions.out.dbsnp_rs_report_filename, export_mongo_cluster_accessions.out.eva_rs_report_filename)
+        detect_duplicates_in_chunk(sort_unique_split_accessions.out.accession_chunk)
+        merge_duplicates_and_notify(detect_duplicates_in_chunk.out.duplicate_accession_chunk.collect())
+}
+