The Omani rial has been pegged to the US dollar at a fixed rate for decades. Understanding what that stability does and does not protect against changes how a Turkish exporter should structure payment terms.
What the peg actually fixes
The Omani rial has been pegged to the US dollar at a fixed rate since 1986, meaning the OMR to USD exchange rate does not float with market conditions the way most currency pairs do, and Oman's central bank maintains reserves specifically to defend that rate.
For a Turkish exporter invoicing in USD, this removes OMR volatility from the equation entirely, since the OMR side of the transaction moves in lockstep with the dollar rather than independently.
What the peg does not protect against
The peg stabilises the OMR against the dollar specifically, but it does nothing to stabilise the Turkish lira against either currency, so a Turkish exporter invoicing in OMR or USD is still exposed to lira volatility on the Turkish side of the transaction unless that exposure is separately hedged or the contract is priced in a way that accounts for it.
This is worth stating plainly because the peg's reputation for stability sometimes leads to an assumption that the whole transaction is currency risk free, when only the Omani leg of it actually is.
Practical banking reference
Omani banks use standard SWIFT and IBAN formats for international transfers, and confirming the receiving bank's SWIFT code and the beneficiary's IBAN directly with the Omani counterpart before the first payment, rather than relying on a previous transaction's details, is a basic check worth repeating for any new banking relationship.