| Expression | Description |
| Open listing | A contract under which the broker is commissioned to find a buyer before the property is sold by the seller or another competing broker |
| Option | The agreement to keep an offer to purchase or lease open for a specific period of time |
| Option listing | An agreement by which the broker advertising the property has the right to purchase the listed property himself |
| Origination fee | A fee paid to the lender for processing a loan application |
| Owner financing | A property transaction for which the seller provides all or part of the financing to the buyer |
| Owner's Title Insurance | A policy insuring the full purchase price of a piece of property for the buyer, usually including adjustments for inflation each year up to a maximum of 150% of the original policy amount, the premium for which is payable at the time of closing |
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