Additional Household Members in sheltered and safeguarding of the community

Hi,
Can I ask what others processes are when a sheltered secure tenant, or leaseholder, wishes to move in another person and it wouldn’t constitute overcrowding?
 
For example, a tenant wishes to move in a partner as a household member, but that person is currently in prison or has a forensic history which could pose a safeguarding risk to other residents?
 
We’re thinking of putting in a mini application process along with an appeals procedure for tenants wanting to do this and wondered if anyone else has anything similar in place?
 
Thanks