Scope and staffing
Areas or posts to be covered, with quantities (buildings, floors, units, pools, gates).
Coverage hours per post per day and days per week.
Minimum staffing per shift and how relief/absence cover is provided.
Commercial terms
State whether prices must be quoted including or excluding VAT.
Contract term (12/24/36 months), start date, and the escalation mechanism at renewal.
What is included: consumables, equipment, uniforms, supervision, training, insurances.
Payment terms, mobilisation period, and exit/termination conditions.
Evidence
Ask for trade licence and any activity-specific approvals relevant to the service.
Ask for references from comparable properties — and actually call them.