Recent Revisions to This Document {#um-doc-revisions}
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26.06.01
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:
Revised and combined Mass Transit Transactions section and Mass Transit Transaction Workflows section into a new section: [Mass Transit Models and Workflows](/docs/vas/en-us/urban-mobility/developer/ctv/rest/mass-transit/um-transit-models-flows-intro.md "").
:
Revised and renamed Additional Workflows section to create a new section: [Common Mass Transit Transaction Workflows and Features](/docs/vas/en-us/urban-mobility/developer/ctv/rest/mass-transit/um-transit-models-flows-intro/um-models-flows-common-intro.md "").
:
Updated the response/request example in [Merchant-Initiated Sale for Visa Debt Recovery with Stored Card Data](/docs/vas/en-us/urban-mobility/developer/ctv/rest/mass-transit/um-processing-emv-vpc/um-processing-sale-mit-intro.md "").
:
Added support for [Merchant-Initiated Sale for Mastercard Debt Recovery with Card Data](/docs/vas/en-us/urban-mobility/developer/ctv/rest/mass-transit/um-processing-emv-vpc/mt-mc-mit-debtrecov-sale-intro.md "").

26.02.01
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:
Updated debt recovery workflow descriptions in [Debt Recovery Workflows](/docs/vas/en-us/urban-mobility/developer/ctv/rest/mass-transit/um-transit-models-flows-intro/um-models-flows-common-intro/um-models-flows-common-debt-recovery.md "").
:
Added response field handling information for authorization requests that return a value in the errorInformation.reason field in these sections:

    * [Mastercard Authorization with EMV Data](/docs/vas/en-us/urban-mobility/developer/ctv/rest/mass-transit/um-processing-emv-vpc/um-processing-mc-auth-intro.md "")
    * [Visa Deferred Sale with EMV Data](/docs/vas/en-us/urban-mobility/developer/ctv/rest/mass-transit/um-processing-emv-vpc/um-processing-sale-deferred-intro.md "")
    {#um-doc-revisions_ul_j5c_wsj_zhc}

:
Added support for [Merchant-Initiated Sale for Discover Debt Recovery with Card Data](/docs/vas/en-us/urban-mobility/developer/ctv/rest/mass-transit/um-processing-emv-vpc/mt-discover-mit-debtrecov-sale-intro.md "").

25.12.01
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This revision contains only editorial changes and no technical updates.

25.02
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Transaction Types
:
Updated the first ride risk (FRR) transaction type descriptions for field values `TransitDA FRR MIT DR auth` and `TransitDA FRR tap DR auth`. See [Mass Transit Transaction Types](/docs/vas/en-us/urban-mobility/developer/ctv/rest/mass-transit/um-processing-emv-vpc/um-processing-trxn-types.md "").

25.01
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Discover
:
Added support for Discover cards in the U.S. See these sections:

    * [Discover Pay As You Go Model](/docs/vas/en-us/urban-mobility/developer/ctv/rest/mass-transit/um-transit-models-flows-intro/um-models-flows-discover-payg-intro.md "")
    * [Discover Authorization with EMV Data](/docs/vas/en-us/urban-mobility/developer/ctv/rest/mass-transit/um-processing-emv-vpc/um-processing-discover-auth-intro.md "")
    * [Discover Sale with EMV Data](/docs/vas/en-us/urban-mobility/developer/ctv/rest/mass-transit/um-processing-emv-vpc/um-processing-sale-discover-intro.md "")