---
title: "FIX 5.0 SP2 EP299: SelfMatchPreventionInstruction <2964> field – FIX Dictionary – Onix Solutions"
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# SelfMatchPreventionInstruction <2964> field

## FIX 5.0 SP2 EP299

### Description

 Type: [int](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/index.html#int)

 Indicate the instruction for self-match prevention when the incoming (aggressive) order has the same [SelfMatchPreventionID <2362>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_2362.html) as a resting (passive) order.

Valid values:

- 1 = Cancel aggressive
  
   Cancel incoming order.
- 2 = Cancel passive
  
   Cancel resting order with the same [SelfMatchPreventionID <2362>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_2362.html).
- 3 = Cancel aggressive and passive
  
   Cancel both incoming and resting order with the same [SelfMatchPreventionID <2362>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_2362.html).

### Used In

- [<TradeReportOrderDetail>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_TradeReportOrderDetail.html)
- [ExecutionReport <8>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/msgType_8_8.html)
- [NewOrderMultileg <AB>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/msgType_AB_6566.html)
- [MultilegOrderCancelReplace <AC>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/msgType_AC_6567.html)
- [NewOrderSingle <D>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/msgType_D_68.html)
- [OrderCancelReplaceRequest <G>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/msgType_G_71.html)
- [Quote <S>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/msgType_S_83.html)
- [MassQuote <i>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/msgType_i_105.html)

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