You should be performing enquiries on all potential occupants of the property.
TPN has noticed that there is an increasing trend for tenants with bad credit profiles to get friends or partners with clean credit to rent properties in their names. This often results in the occupant with bad credit not paying their share of the rent, resulting in partial payment.
This can be very frustrating for Estate Agents and Landlords as the paying tenant normally refuses to pay the remaining portion of the rental