Of course, if you do send cash it's going into the hands of a scammer.
Now, you might think "I'd never mistake a scammer for my grandkid!" However, scammers have all sorts of tricks to make you believe they're for real.
First, the scammer grabs details about your family from social media sites like Facebook. They can pick up on nicknames and other intimate details. These add a sense of legitimacy to the scam.
An easy fix for this is good Facebook privacy settings. Click here for settings that limit what outsiders can see.
With good privacy, scammers won't be able to mimic your loved one as easily. Make sure your relatives all secure their Facebook accounts, too.