Dogs should always wear a collar with ID tags listing your current contact info. Update regularly.
ID
Get your dog microchipped as a permanent way to identify them if they become lost.
Microchip
Train a reliable recall command like "come" so your dog returns when called if they do go off.
Recall
Install physical fences or an invisible fence to prevent escape from your yard.
Secure Yard
Always keep your dog leashed when out on walks to prevent running off.
Leash Walks
Never let your dog off-leash to chase things, as their instinct is to keep pursuing.
Avoid Chasing
Use a GPS collar or tracker as an added precaution if your dog has escape risk.
GPS Tracker