Post Op is a shipping company in Grand Theft Auto IV and Grand Theft Auto V, and is a parody of the United Parcel Service. Though it is not featured in any missions, its trucks, which are mainly Bensons, can be found in many places. The name is a sly-reference to a post-operation transsexual, further evidenced by the slogan "No Longer Just Mail". In GTA V, the company vehicles are Mule and the Benson, which both can be found in Los Santos.
- Post Op's name is a reference to sexual realignment surgery, whilst also being a play on the fact the company is a postal business.
- The company's possible rivals are Liberty State Delivery and Alpha Mail. They all use a different type of truck (LSD = Yankee, Alpha Mail = Mule, Post Op = Benson).
- Mailmen for the company can be seen but are rare.