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 (UPS). 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".
- 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).
- The company's logo is likely based on the UPS logo.
- Mailmen for the company can be seen but are rare in GTA IV. They are, however, more common in GTA V.