Google Maps Guide, Cecelia wrote in a Google Maps Help thread that Google will be enabling Google Local Business Favorite places to reorder lost or damaged Google QR code decals.

Ever since Google has been sending these out, I have seen threads from business owners asking how they can get replacement decals. For one reason or another, these people have lost or damaged the decals, and had no way to replace them.

Cecelia said in the thread:

Seems like it is coming soon, probably within the Google Local Business Center. When it does go live, we will let you know.

She also answered a frequently asked question:

Forum discussion at Google Maps Help</a.