senderInformation. middleInitial {#sender-info-middle-initial}
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Middle initial of sender when the sender is an individual. When the sender is a business or government entity, use the senderInformation.name field instead.  
This field is available only on the `Barclays`, `FDC Compass`, `FDC Nashville Global`, `First Data Merchant Solutions`, `LloydsTSB Cardnet`, `OmniPay Direct`, and `Streamline` processors.

For `Barclays` processor
:
When you process Account Funding Transactions (AFT) with Visa, this field must be alphanumeric. You must not exceed 30 characters for the concatenated value of senderInformation.firstName, senderInformation.middleName, and senderInformation.lastName fields.

Specifications {#sender-info-middle-initial_Specifications}
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* **Data Type:** String
* **Data Length:** 1
  * `Barclays`: See field description.
  * `FDC Nashville Global`, `Streamline`: 35
  * `First Data Merchant Solutions`, `LloydsTSB Cardnet`, `OmniPay Direct`: 25
    {#sender-info-middle-initial_ul_o5q_nbn_ddc}

Mapping Information {#sender-info-middle-initial_Mapping}
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* REST API Field: senderInformation.middleInitial
* SCMP API Field: sender_middleinitial
* Simple Order API Field: sender_middleInitial