# One-by-one validation

Tap a card on the **Validate** tab — the app searches for a tag carrying exactly that
card's EPC and shows a full-screen verdict: green **PAIRED** (with the tag's RSSI) or
red **TAG MISSING**. The card's [NXP originality](nxp-originality.md) status is shown
underneath. The screen is immediately ready for the next card.

~~~gallery w=180 scroll
![Idle](assets/validate-idle.png)

![Searching](assets/validate-searching.png)
The reader looks for the card's EPC within the configured scan duration.

![Paired](assets/validate-paired.png)
A tag answered — its RSSI is shown.

![Missing](assets/validate-tag-missing.png)
No tag with this card's EPC in range.
~~~

~~~gallery w=180 scroll
![Idle (tablet)](assets/validate-idle_l.png)

![Searching (tablet)](assets/validate-searching_l.png)

![Paired (tablet)](assets/validate-paired_l.png)

![Missing (tablet)](assets/validate-tag-missing_l.png)
~~~