Foam party liability and waivers
Most people arrive at this question the same way. You volunteered to organize something fun, and then an email came back: "We'll need a COI from the vendor and a release form on file." Everyone else on the thread replied "sounds good." You have no idea what a COI is, and it is now 10pm.
So, first: that request is routine, it is not a sign anyone is worried, and it is not yours to solve personally. A COI is a certificate of insurance — a one-page PDF from an insurer naming the company, the policy dates, and the coverage limits. You forward the request to the foam company. They email it. That is the whole task.
The rest of this page is what sits behind it: who carries the risk, what to ask before you book, and what a waiver does and doesn't do.
Bubbalooza is not a law firm and this is not legal advice. Rules on waivers and liability differ from state to state, sometimes sharply. If your event is public, ticketed, or run by an organization, put the question to a lawyer licensed where you live. What follows is meant to make that conversation shorter.
Who is actually on the hook
There are usually three parties at a foam party, and each carries a different slice of the risk.
- The operator — the company running the machine. They control the equipment, the solution, the foam depth, and where the cannon points. Operators who work with schools carry general liability coverage for exactly this reason.
- The host — you, or the organization whose event it is. You control the guest list, the surface, the supervision, and whether anyone told the families what their kid was walking into.
- The venue — your yard, a park, a school field, a church lot. Whoever owns the ground has an interest in what happens on it, which is why public venues want paperwork before they say yes.
Hire a company and hold it in your own yard, and the first two slices are split between you and them while the third is also you. That split is what the paperwork writes down. Run the whole thing yourself with a rented or purchased machine — see renting vs. buying a foam machine — and all three are yours, with nobody's policy behind you.
The insurance question, and why you have to ask it out loud
Here is something we noticed while building the 2026 foam party pricing survey. We recorded the published pricing pages of 16 foam party operators across 13 states. Those pages list what you get for the money in real detail — cannon type, solution, music, inflatables, staffing, run time. Exactly one of the 16 named general liability insurance among the things the price includes.
That is easy to misread, so: it does not mean fifteen operators are uninsured. It means insurance is almost never something companies advertise — it lives in the paperwork, not the sales copy. Which means a website will not answer this question for you in either direction. You have to ask.
And ask for the document, not the answer. "Are you insured?" gets a yes from everybody. "Can you email me a certificate of insurance?" gets you the PDF — or it gets you a change of subject, which is also an answer.
What to ask before you book
| Ask this | What you're listening for |
|---|---|
| Can you send a certificate of insurance? | An actual PDF with current dates — not a verbal yes. |
| Is the policy current through my event date? | Check the expiry yourself. Parties get booked months out. |
| Can you add our school or venue as additional insured? | Institutions usually require this. A company that does it routinely says yes without flinching. |
| Do you have a waiver or release you want signed? | Ask for it in advance so you can read it before the day. |
| Who runs the machine — your staff, or us? | An attended party puts a trained adult on the equipment. That is a real difference. |
| What surfaces will you not set up on? | An operator with a firm answer here has thought about slips. |
| What's your call on rain, wind, or heat? | The weather backup plan covers what a good answer sounds like. |
None of these should feel awkward to ask; a company that runs children's events answers them every week. The directory of foam party companies is where to start — call two or three and compare the answers, not just the price, with what a foam party costs for what a normal quote looks like.
What a waiver actually does
A waiver is not a force field. It is a record — of what people were told, what they understood, and what they agreed to anyway. That record does real work: it shows the risks were disclosed rather than hidden. But how much weight it carries varies by state, by how the document is written, and by what happened on the day. Three things worth knowing before you put faith in one:
- A parent signing away a child's claim is treated differently in different states. Some enforce it, some don't, some enforce parts of it. This is the biggest reason a template you found online is a poor fit for a large event.
- Waivers don't reach conduct a court considers reckless. Nobody signs away your obligation to run the thing carefully.
- An unread waiver is a weak waiver. A form handed over at the gate while a kid pulls at someone's sleeve does less than the same form emailed three days earlier with the risks in plain language.
Which points at the real conclusion, and it is a relieving one: the waiver is the smallest part of running a careful event. Shallow foam, a surface people can get up from, and one adult whose only job is watching prevent more harm than any paperwork ever signed.
If your party is at a school, church, camp, or fundraiser
Everything above gets more formal — and, usefully, more decided for you. Organizations that host children's events already have a process. They will almost always want a certificate of insurance from the operator, often with the organization named as additional insured, plus their own permission slip going home to families.
The right move is to ask them first, before you book anyone. Their requirements set your shortlist, and it is far easier to find a company that meets them than to talk a school out of them. We cover each setting in foam parties for schools, church and VBS foam parties, summer camp foam parties, and running one as a fundraiser, where money changing hands adds its own questions. Licensed childcare is stricter again — foam parties for daycares covers that.
One thing worth saying plainly in the note that goes home: what the party is, how deep the foam gets, and that swimsuits and a towel are the right call. Most upset after a children's event comes from a parent not knowing what was going to happen.
If you run foam parties as a business
Same page, other side of the table. The clients who ask for a certificate of insurance are the clients who book repeatedly — schools, churches, camps, city departments — and producing one the same day is a real advantage over whoever is quoting against you. Losing an institutional booking rarely comes with an explanation; often this was it. Our guide to what foam party businesses make covers the economics; coverage sits in the fixed-cost column as the thing institutional work is gated on.
Two practical notes. Put your coverage somewhere clients can see it — almost nobody does, and it costs nothing to be the one who does. And keep signed forms somewhere you can find them a year later; a release you cannot produce is a release that did not exist.
The three that prevent more than paperwork does
- Eyes: foam solution can sting. Keep clean water and a dry towel within arm's reach the whole time, and check on the youngest guests rather than waiting to be told.
- Slippery surfaces: grass under foam is slick and hardscape is slicker. Keep young children within arm's reach of an adult, and keep foam off concrete where you can.
- Supervision: OMG Foam Parties advises that supervising the kids during the event is crucial to prevent slips and falls. One adult whose only job is watching — not greeting, not photographing.
Frequently asked
What is a COI, and why does the school want one?
A certificate of insurance: a one-page document from an insurer naming the company, the policy dates, and the coverage limits. Schools, churches, parks departments and camps ask for one from any outside vendor coming onto their property, for every kind of event. The request is routine. You forward it to the foam company and they email the PDF, usually within a day.
Do foam party companies carry insurance?
Many do, but very few say so where you can see it. Across the 16 operators whose published pricing pages we recorded in July 2026, exactly one named general liability insurance among the things its price includes. That's a fact about marketing copy, not coverage — the other fifteen may well be insured and simply don't list it. A website won't answer this either way, so ask directly, and ask for the certificate rather than a yes.
Do I need guests to sign a waiver for a backyard foam party?
For a small birthday among families you know, most hosts don't use one — and a waiver isn't what keeps anyone safe. Supervision, shallow foam, and a surface people can stand up on matter far more. Paperwork becomes normal once the event gets bigger or more public, like a school field day or a fundraiser, and at that size the organization usually has its own form. Ask them first rather than writing your own.
Next steps
With the paperwork handled, the party planning checklist tool keeps the rest from falling off the list, and the free printable planners have a timeline if you'd rather work on paper. Running it yourself instead of hiring? How to throw a foam party is the full walkthrough — and the safety guide is the part that actually protects anyone.