# Freeze/Unfreeze Card
source: https://developer.mastercard.com/benefit-allocation-service-mtls/documentation/use-cases/card-operations/freeze_unfreeze/index.md

#### Overview {#overview}

**Actors:** Issuer developer, Mastercard Global Benefits Platform  

**Preconditions:** Card exists and is associated to the ICA; card is not expired; for unfreeze, the card must currently be in a frozen state  

**Outcome:** The card's frozen status is toggled; benefit eligibility is suspended (`isFrozen: true`) or reinstated (`isFrozen: false`); segment and bundle assignments are not modified  

**Endpoint:** `PUT /cards` --- use this endpoint to temporarily suspend or reinstate benefit access without affecting underlying assignments; use [Cancel Segment](https://developer.mastercard.com/benefit-allocation-service-mtls/documentation/use-cases/segment-operations/cancel_segment/index.md) or [Cancel Bundles](https://developer.mastercard.com/benefit-allocation-service-mtls/documentation/use-cases/bundle-operations/cancel_bundles/index.md) if the intent is to permanently remove benefits

Freezes or unFreezes the card for benefits by taking a card number and boolean as input. Passing in
a true for the boolean freezes the card, and false unfreezes the card.
Diagram freeze_unfreeze
API Reference: `PUT /cards`

### Card Freeze {#card-freeze}

1. Cardholder requests their card be frozen.
2. Issuer sends a request with a card number, and true as an input parameter
3. Benefit Allocation Service API returns success code 204 returned that means cardholder will no longer be able to re-service with benefits.

### Card Unfreeze {#card-unfreeze}

1. Cardholder requests their card be unfrozen.
2. Issuer sends a request with a card number, and false as an input parameter
3. Benefit Allocation Service API returns success code 204 returned that means cardholder will be able to re-service with benefits.

## Additional Information {#additional-information}

* When a card is in Freeze status, a cardholder cannot use their segment benefits or personalized benefits with many of the vendors.
* If a card is frozen the Freeze status will not carry over to the new card

Tip: The following operations are allowed to be performed after Freeze/Unfreeze Card: **Freeze/Unfreeze, Replace Segment, Cancel Segment, Replace Card**

1. Look at the [API Reference](https://developer.mastercard.com/benefit-allocation-service-mtls/documentation/api-reference/index.md) for information on how to implement this use case.
2. Look at the [Responses Codes and Error Codes](https://developer.mastercard.com/benefit-allocation-service-mtls/documentation/code-and-formats/index.md) for acknowledgement responses.