I know that words like login and payoff are properly nouns but I increasingly notice many (not at all uneducated) people use them as verbs:
Will you payoff your credit card this month?
Please check this when you login.
To me (a non-native English user), that seems incorrect because separating the core noun from a preposition is what I was taught: Please check this when you log in. (My emphasis)
Is this use proper or not?