## MedicationCheckoutItemResult.vendorLineId property [​](/content/docs/sdk/core.medicationcheckoutitemresult.vendorlineid#medicationcheckoutitemresultvendorlineid-property "Direct link to MedicationCheckoutItemResult.vendorLineId property"/index.html)

Vendor per-line reference returned at checkout, for diagnostics/audit. The concrete meaning is vendor-specific: a cart-item id for cart-based vendors (ScriptSure MedCart `rxId`) or a per-prescription id for queue-based ones. Optional because the vendor may not mint one at add time.

**Signature:**

```typescript
readonly vendorLineId?: string;
```

- [MedicationCheckoutItemResult.vendorLineId property](/content/docs/sdk/core.medicationcheckoutitemresult.vendorlineid#medicationcheckoutitemresultvendorlineid-property/index.html)