> ## Documentation Index
> Fetch the complete documentation index at: https://docs.proofable.me/llms.txt
> Use this file to discover all available pages before exploring further.
# Reuse verification
> Stop making users and agents prove the same thing again. Accept a current proof that already meets your rule.
When someone already holds a proof that meets your rule, Proofable accepts it and skips the check.
```text theme={"dark"}
Existing proof
↓
Current?
↓
Valid for this rule?
↓
Passed
```
## How reuse is decided
Proofable looks for proofs the person or agent already holds for each required check.
Expired and revoked proofs never count. Point-in-time checks, such as a token balance or wallet risk, must be recent enough for your rule.
A stricter rule can need a new check. A basic proof of human does not satisfy a gate that also requires a minimum age.
If every requirement is covered, the person continues. If not, they complete only the missing checks.
## Reuse in your product
| Where | How |
| --------------- | -------------------------------------------------------------------------------------- |
| React | `VerifyGate` reuses a saved proof by default (`strategy="reuse-or-create"`). |
| Your server | `gateCheck` returns `allRequiredSatisfied` and which checks were satisfied or missing. |
| An AI assistant | `proofable_proofs_check` answers yes or no without creating anything. |
| New proofs | Pass `reusedVerifierProofs` from the gate check so satisfied checks are not run again. |
```js theme={"dark"}
const { data } = await client.gateCheck({
gateId: 'gate_your-app-name',
address: user.accountAddress,
includeQHashes: true,
});
if (data?.gate?.allRequiredSatisfied !== true) {
// Ask the person to verify data.gate.missingVerifierIds
}
```
## Reuse costs less
| Action | Credits | List price |
| ----------------------- | ------- | -------------- |
| Check an existing proof | 1 | \$0.0025 |
| Create a new proof | 4 to 73 | $0.01 to $0.18 |
Signed-in owners checking their own proofs through MCP pay nothing.
## Private proofs
Gate checks read public and unlisted proofs by default. A private proof counts when its owner is signed in, or when you pass a signed payload from `createGatePrivateAuth`. [Gates in the SDK](/sdks/gates)
## Next
What a proof records and how to read it.
Freshness, reuse strategies, and revocation.
How reuse works inside a checkout.
What checks and new proofs cost.