Anyone have any idea how this can be represented in FIX ?
I noticed tag 172 close to this settlement instructions, but dont know how exactly to use.
SettlDeliveryType(172) expresses the type of delivery but not the time. SettlType(63) does and 1=Cash (TOD / T+0) may work for you. You did not provide any message context. Tag 63 is part of very many messages and should suffice if you do not need more than one delivery type (DvP). Tag 172 has a much more restrictive context as part of settlement and collateral messages and the allocation group. Suggest to rather use DeliveryType(919) for this (identical values). It is part of the component FinancingDetails which is again part of very many messages.