Listed rules get tested.
Signed rules get kept.

Most guests follow a rule they actively signed. The ones who don’t are the reason the PDF certificate exists. PreArrive does both jobs: it gets every guest to acknowledge each rule and each fee before check-in, and it keeps a tamper-evident record for the rare case that goes the other way.

What you have today

A chat screenshot and your word

Your rules are in the listing description. Your fees are mentioned in a welcome message. The guest read them — probably. There’s no record of when, or whether.

Hi — checking in tonight. What’s the WiFi?
Maya · May 22, 8:14 PM
Welcome! WiFi is PineCabin / honeymoon. Reminder no smoking and 6-guest max please.
You · May 22, 8:16 PM
Closed · insufficient evidence
What the file actually needs

A timestamped, signed acknowledgment

Disclosure of each fee in writing, acknowledged line-by-line by the guest, before check-in. With IPs, timestamps, and a content hash that can’t be edited after the fact.

SIGNED

Pine Hollow Cabin · HMQ8X4P9

Sent2026-05-21 14:08
Acknowledged5 of 5 items
Signed2026-05-22 09:13
SHA-256d3f8…b2c1

One incident. Two ways it ends.

Pick one of the three patterns hosts file claims for, then watch it play out twice. The difference is never the damage — it’s whether the guest’s signed acknowledgment was on file before check-in.

A guest smokes inside. You discover it at turnover.

Same incident, day-by-day
Without
PreArrive Documented in a chat
Day 0

Reservation confirmed

No-smoking rule in listing
Day +3

Checkout

Cleaner photographs ash and odor
Day +3

Open Resolution Center case

Request $500 remediation
Day +6

Guest denies smoking

You send chat screenshot as evidence
Day +14

Case closed — disclosure ≠ acknowledgment

You pay for the remediation
With
PreArrive Signed packet on file
Day −2

Packet sent

$500 smoking remediation fee disclosed
Day −1

Guest signs

Acknowledged line-by-line · 09:13 EDT
Day +3

Checkout

Cleaner photographs ash and odor
Day +3

File with packet + photos

Signed certificate attached
Day +5

A complete file goes to AirCover

Outcome at Airbnb’s discretion · illustrative timeline
Without: case closed against host With: a complete file, ready to file

People keep a rule they signed.

Sixty years of behavioral research point to one finding: people who actively sign, tap, or write down an agreement act consistently with it afterward. Passive notice — a paragraph in a listing, a sign on a wall — doesn’t move behavior the same way.[1][2]

Passive notice Behavioral pull on the guest Active commitment →
Sign on the wallGlanced at, maybe
Weak
Listing descriptionSkimmed during booking
Weak
Guidebook PDFOpened, perhaps
Weak
Chat reminder“Got it, thanks”
Some

A PDF you can hand to anyone.

Airbnb support staff, an insurer, a small-claims clerk — the same artifact works in all three venues because the chain of custody is legible to all three workflows.

Certificate of Signed Acknowledgment

Pine Hollow Cabin · Reservation HMQ8X4P9
Maya R. · May 24 – May 27, 2026
Sent 2026-05-21 14:08 EDT · Signed 2026-05-22 09:13 EDT

Disclosure delivered to guest✓ before check-in
Itemized fees acknowledged3 of 3
House rules acknowledged2 of 2
Email click recorded71.142.88.4
Signature event recorded71.142.88.4
Maya R.
2026-05-22T13:13:04Z
SHA-256: d3f8a1c9e2b4607a8f12e9ab2c4d5e6f78901234abcdef567890123456789ab2c1
A

Disclosure on a date that pre-dates check-in

The packet was sent three days before. Date is the legal pivot — disclosure must happen before the stay begins.[3]

B

Line-by-line acknowledgments

Each fee and each rule was tapped individually. Not a bulk “I agree” checkbox.

C

Two-event audit chain

Email click and signature event — each with its own IP and timestamp. Together they are the evidentiary spine.

D

Cryptographic seal

SHA-256 over the disclosure text and acknowledgments. A one-character edit produces a different hash.

Build your first packet — free

Your next reservation, signed before check-in.

Build a packet once, send it on every reservation. Free covers one property. Paid tiers start at $9/mo when you outgrow the volume caps.