Co je doma to se počítá, pánové...(1980)

Overview:

For the Novák and Bartáček families, money is king, and they'll do just about anything to get it. While René Novák pitches his parents a lucrative scheme to swindle as many people with the last name Novák in the country as possible, the Bartáček clan decides to pretend to be much poorer than they really are in order to siphon some dollars from an American relative. And it doesn't take long before these separate scams start to intertwine.