# CMS Identifiers Search
source: https://developer.mastercard.com/mastercard-processing-core/documentation/sandbox-testing/cms-identifiers-search/index.md

The following test cases are provided in this section:

|                                                                                     Test case                                                                                      |                          Test case scenario                          |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------|
| [Retrieve clientId](https://developer.mastercard.com/mastercard-processing-core/documentation/sandbox-testing/cms-identifiers-search/retrieve-clientid/index.md)                   | Success -- Retrieve clientId by the client number                    |
|                                                                                                                                                                                    | Success -- Retrieve clientId by the identification document number   |
|                                                                                                                                                                                    | Success -- Retrieve clientId by the social number                    |
|                                                                                                                                                                                    | Success -- Retrieve clientId by the taxpayer identifier              |
|                                                                                                                                                                                    | Fail -- No Client found                                              |
| [Retrieve accountContractId](https://developer.mastercard.com/mastercard-processing-core/documentation/sandbox-testing/cms-identifiers-search/retrieve-accountcontractid/index.md) | Success -- Retrieve accountContractId by the account contract number |
|                                                                                                                                                                                    | Success -- Retrieve accountContractId by the CBS number              |
|                                                                                                                                                                                    | Fail -- No Account Contract found                                    |
| [Retrieve cardContractId](https://developer.mastercard.com/mastercard-processing-core/documentation/sandbox-testing/cms-identifiers-search/retrieve-cardcontractid/index.md)       | Success -- Retrieve cardContractId by the card contract number       |
|                                                                                                                                                                                    | Success -- Retrieve cardContractId by the CBS number                 |
|                                                                                                                                                                                    | Fail -- No Card Contract found                                       |