It is sometimes neccessary to temporarily disable monitoring on a given host in Zabbix. But it's possible to forget to re-enable monitoring after the need to disable it has passed.  While maintenance periods can be set, they are sometimes not flexible enough. So, to alert us if a host is left in unmonitored state too long, we present forgetmentnot.  The scope is simple, check zabbix for unmonitored hosts that don't belong to a whitelist of host hostgroups. (in our case, decommissioned, and spare_servers) Alerting if any unmonitored hosts not in the whitelist groups remain in unmonitored state for longer than a configurable amount (set to 24 hrs by default)