Signs of a spoilt teenager?

If you gave money to a teenager and you have to remind them to say thank you. Does this mean they are spoilt? For instance at Christmas my partner kids get around £500 each. Maybe more and when I give them money I have to say or my girlfriend says to them, what do you say? Like you have to remind them to say thank you.

is this a sign of these kids are spoilt?

i personally think so.

Signs of a spoilt teenager?
Post Opinion