Tenants’ names and owners’ email addresses on strata roll

One of our buildings owners seems to rent out his premises cash in hand. Most probably to avoid declaring income.

Therefore there is no official tenancy agreement nor listing on the roll of who lives in the unit.

The owner did this with the previous tenant and for whatever reason, The Strata Manager it would seem has been rather careless with the Strata roll when it comes to tenancy details in this matter and even other legitimate tenancies.

My query is whether this is a usual practice and there is a slackness in Strata roll updating or these are serious breaches.