Overview
The signature step type renders a touch-based signature pad in the Rundun mobile app. The executor draws their signature with their finger or stylus. The signature is captured, uploaded to Rundun's servers, and stored as part of the step's answer.
No PDF generation, no printing, no scanning, no email attachments. The signature is part of the checklist run record — accessible via the API, included in the completion webhook, and stored permanently.
How it works
A signature step presents a white drawing canvas. When the executor taps "Done", the app:
- Captures the signature from the canvas
- Uploads it securely to Rundun's servers
- Submits the step answer with the signature attached
TDL configuration
{
"id": "s-sg01",
"type": "signature",
"label": "Customer signature — I confirm the vehicle condition is as described",
"required": true
}The signature type has no additional config options. It renders as a full-width signature canvas. Set required: false if the signature is optional.
Answer shape
The answer value is a URL pointing to the stored signature image:
{
"s-sg01": {
"value": "https://media.rundun.app/runs/r-550e8400.../s-sg01/signature.png",
"at": "2026-05-22T09:15:00Z",
"by": "u-abc12300-..."
}
}Use cases
Car rental handoff
Place a signature step at the end of your pre-rental checklist: "Customer confirms vehicle condition at handoff." If the customer later disputes pre-existing damage, you have their timestamped signature alongside photos of the vehicle in the same run record.
STR cleaner sign-off
Have your cleaner sign at the end of each turnover checklist: "I confirm the unit is ready for the next guest." This creates accountability and a clear record of who completed the turnover.
Delivery confirmation
For any workflow requiring proof of delivery or acceptance, a signature step provides a legally meaningful acknowledgement without paper.
When to add a signature step
Add a signature step whenever you need an explicit acknowledgement of responsibility — vehicle handoffs, completion of work, acceptance of terms at the point of service. Place it at the end of your checklist so the signer has reviewed all the evidence (photos, condition notes) before signing.
When to skip signatures
Don't add a signature step to internal operational checklists where the executor and the creator are in the same organization — a GPS-stamped photo record is typically sufficient. Signatures add friction for the executor and are most valuable when the signer and the requester have a formal relationship.