The OUR fee option is the charge instruction for an international payment under which the sender pays all bank charges, and it is described in full under OUR (our charges). "Fee option" is the phrase banks often use on payment forms and online banking screens, where the customer picks between OUR, SHA and BEN when sending a wire.
With OUR, the sending bank charges the sender its own fee and, in principle, an extra amount to cover the charges of correspondent and beneficiary banks, so that the recipient receives the full amount sent. In SWIFT messages the choice is shown in the charges field of an MT103 or the equivalent element in ISO 20022 messages. In practice, intermediary or receiving banks do not always honour the instruction, so a payment can still arrive short; services such as SWIFT gpi help show where any deduction occurred.
The alternatives are the SHA fee option, in which sender and recipient each pay their own bank's charges, and the BEN fee option, in which the recipient bears all charges. Within the European Economic Area, payments in EEA currencies are generally required to use shared charges.