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

#### Overview {#overview}

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

**Preconditions:** The old card has active segment or bundle assignments; the new card number is valid, not yet in use, and within the same ICA account range  

**Outcome:** All active benefits are expired on the old card and reapplied to the new card using the specified effective date; the old card cannot be used as a replacement source again  

**Endpoint:** `POST /cards` --- use this endpoint to transfer all benefit assignments from one PAN to a new PAN; use [Freeze/Unfreeze](https://developer.mastercard.com/benefit-allocation-service-mtls/documentation/use-cases/card-operations/freeze_unfreeze/index.md) if you only need to temporarily suspend benefits without changing the card number

Replaces the card number associated with the user by taking an existing card number, new card number and effective date
in the input. The benefits on the existing card number are expired, and the same set of benefits are applied to new card
number using the given effective date. Only a new card can be used for card replacement.
Diagram card_replace
API Reference: `POST /cards`

### Card replacement {#card-replacement}

1. Cardholder requests a new card.
2. Issuer sends a request with an old card number, new card number and effective date as an input parameter
3. Benefit Allocation Service API returns the segment benefit codes replaced with effective and expiration dates. Segment bundles are associated to the card using the effective date of the previously expired card.

## Additional Information {#additional-information}

* The original card can be replaced with a new card.
* If the card was replaced, the original card cannot be replaced.
* This will only cancel the segment benefits for the old card; the card is not blocked from getting non segment benefits.

Tip: The following operations are allowed to be performed after Replace Card: **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.