How do I cancel a shipment I have just recently sent out?

If I shipped out a DHL package and wished to cancel it (same day), is it possible to do so? How?

Living in Turkey can i cancel a shipment i sent out to america today? I realize i put the wrong address and i need it sent back to me. Do post offices in turkey have this same service ? I know incan cancel a shipment in usa but im not sure about in turkey...

My stuff was supposed to be shipped like a week ago on Amazon, and the seller never confirmed the shipment, but I keep getting this message: This portion of your order is being prepared for shipment and cannot be canceled or changed. I don't know if...

I pre-ordered the wrong product, I put in a cancel request but apparently they unable to stop the shipment. They suggested I refuse the shipment, and or send it back. Problem with that is that I really don't want to be charged extra for something that...

I had about $100-worth of video games I didn't want anymore, so I packaged them up and shipped them to GamePawn.com. Knowing that they've have ads in gaming magazines and what-not, I didn't give the site's legitimacy a second thought. This was Tuesday...

I am getting a shipment from someone that i bought something from. The shipment was sent Friday Evening using priority mail usps. She said it should be there in 2 days so my question is when should i get it sunday or monday like do they process shipments...