The letter was typed on a computer but signed by hand with "Constable" and a smile emoji next to it.
Members of the public were touched by both Madison and Counties Manukau Police's touching letters, with many praising police for their often thankless efforts on our roads.
"This makes my day. You guys and gals do a great job, at times thankless, but I do appreciate you all," one person said.
Another wrote: "Doing a great job out there C M Police, Keep catching those Drink Drivers & lock up there cars for a while."