CtrlSum
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It is recommended to use these optional fields in Group Header (GrpHdr) and Payment Information (PmtInf). It is an additional validation of your file. Please use CtrlSum in combination with NbOfTrx.
<GrpHdr>
…
<NbOfTxs>1</NbOfTxs>
<CtrlSum>0.87</CtrlSum>
…
</GrpHdr>
<PmtInf>
…
<NbOfTxs>1</NbOfTxs>
<CtrlSum>0.87</CtrlSum>
…
</PmtInf>
Please do not use leading zero in all amount or sum elements. This will be rejected by schema validation immediately.
Not to be used: <CtrlSum>00000000000040258.64</CtrlSum>