A certificate of insurance is the document an office tower or colocation facility requires before a move crew can work on site, summarizing the contractor's policies, insurers, dates, and limits. If it is missing, late, or wrong, the crew waits in the lobby while the move window runs out. It is a common reason move days start hours behind.
The certificate itself is a simple document. The requirements behind it are not, and they differ from building to building. Treat certificates as a planning item with its own lead time, not as paperwork someone sends the morning of the move.
What Is a Certificate of Insurance?
A certificate of insurance is a summary, usually issued on a standard industry form, showing which policies a contractor holds, the insurers, the policy numbers, the effective dates, and the limits. The contractor's insurance agent or broker issues it at the request of whoever needs it.
The certificate is evidence, not coverage. It describes policies that exist; it does not change them. Most certificate forms say so in plain language near the top. This matters because building managers often ask for terms on the certificate, such as additional insured status, that only exist if the underlying policy has been endorsed to provide them.
This is also a different question from what happens if equipment is damaged in transit. Cargo coverage, declared value, and carrier liability limits belong to insurance valuation and liability for equipment in transit. The certificate a building wants is about protecting the building, its owner, and its occupants from the crew's work on site.
Which Coverages Do Buildings Ask For?
Requirements vary, but most property managers and colocation providers ask for some combination of the same four lines of business insurance.
Commercial general liability. Covers bodily injury and property damage caused by the contractor's operations. A dropped rack that cracks a lobby floor or injures a tenant falls here. Buildings typically specify a per-occurrence and an aggregate limit.
Commercial auto liability. Covers vehicles used in the work. Buildings with loading docks care about this because trucks back into their structures, and some specify that it apply to any auto, including hired and non-owned vehicles.
Workers' compensation and employer's liability. Workers' compensation is required by state law for most employers and covers the contractor's own injured workers. Buildings ask for it so that an injured crew member's claim does not land on the property.
Umbrella or excess liability. Sits above the general liability, auto, and employer's liability limits and raises the total available. Large buildings and colocation facilities often set a combined requirement that only makes sense with an umbrella in place.
The limits a building sets are its own choice. Read the vendor requirements document rather than assuming the last building's numbers apply.
What Do Additional Insured and Waiver of Subrogation Mean?
Both are policy endorsements that extend protection to the building, and they cause most of the back-and-forth.
Additional insured status extends the contractor's liability coverage to named third parties, usually the building owner, the property management company, and sometimes the landlord's lender or the colocation operator. If someone sues the building over an incident caused by the move, the contractor's policy responds for the building too. Requirements often add that this coverage be primary and non-contributory, meaning the contractor's policy pays first without asking the building's own insurer to share.
Waiver of subrogation means the contractor's insurer gives up its right to recover a paid claim from the building. Without it, an insurer that pays a workers' compensation claim could turn around and pursue the building owner. Buildings commonly require waivers on general liability, auto, and workers' compensation.
Both are endorsements to the policy. If the contractor's policy does not include them, or does not include them for the specific entities named, the certificate cannot honestly show them. Some buildings ask for copies of the endorsement pages along with the certificate.
Why Do Certificates Get Rejected?
Most rejected certificates fail on details, not coverage.
The certificate holder or additional insured name does not match the building's required legal entity name exactly. The owner is a limited liability company with a name nobody on your team has ever seen, and the certificate names the building's street address instead.
Limits fall short of the requirement, or the umbrella does not list the underlying policies it sits above.
Effective dates lapse before or during the move. A policy that renews on the first of the month needs a fresh certificate if the move straddles the renewal.
The certificate names the wrong company. A subcontracted crew or a separate rigging firm needs its own certificate, and the building may want every company that will enter, not just the prime contractor.
A colocation facility often has separate requirements for the facility operator and for the landlord of the building it sits in. Both may need to be named.
Lead Time and Who Owns It
Request the building's vendor insurance requirements as early as possible, ideally when the move is first scoped. A pre-move site survey is a natural point to collect them, along with dock hours, elevator reservations, and access procedures. For a colocation migration, get the facility's vendor packet at the same time you request the move-in work order.
Send the requirements to the contractor in writing, and give the contractor's broker enough time to issue the certificate and add any endorsements. Simple certificates can come back within a day or two. Endorsements for new additional insured entities can take longer, and a building's review may add more days on top.
Ask for the certificate to be sent directly to the building and copied to you. Then confirm with the building, in writing, that it has been accepted. That confirmation belongs in the move plan alongside the site access and crew vetting requirements for the same building.
Keep a simple tracker with one row per building and per company entering it: requirement received, certificate requested, certificate issued, accepted by building. On move day, nobody should be discovering for the first time what the front desk wants to see.