"Boeing" type stickers on aircraft

[Damian N]

I have always wondered about the 'aircraft type' stickers seen for many decades on Boeing aircraft. These typically say things like "Boeing 737-800" and are usually located on both sides of the aft fuselage. I used to always think that Boeing provided these stickers free of charge when a new aircraft was delivered. However it is obvious one that when aircraft are repainted the stickers go back on (often in a new colour).

So does Boeing provide a continuing offer of stickers through-out the lifespan of an airframe or do he airlines themselves believe in either a marketing or a ramp operations / safety benefit and pay for these decals???