Apple Care
My daughter is giving me her ipad. Will it keep the warranty? Can I add apple care once it is in my name?
iPad Pro 11-inch Wi-Fi
The warranty is linked to the serial number and transferring the device from her to you won't cancel the warranty.
You can check the warranty in the following ways:
Use an internet browser and go to: mysupport.apple.com
More information in Find information about your warranty or AppleCare plan - Apple Support
Also:
On an iPhone or iPad: Settings > General > About > Coverage
AppleCare cannot be added to a device after it is 60 days old.
Also, not related to warranty or AppleCare but the following has information that may help your daughter clear her information from the iPad: What to do before you sell, give away, or trade in your iPhone, iPad, or iPod touch - Apple Support