I will display my adsense ads on my friend blog. The blog is where her adsense account banned since too many invalid click. Because she doesn't has adsense account anymore, I want to use her blog to display my adsense ads. My question is: will my adsense account endanger if I use the blog to display mine?
Yes, it is very risky because as you say the site get banned due to invalid click, so high possibility that it will happen again
if same thing happen again with her blog like policy voilation or invalid clicks then your account can be disabled. if blog is adsense friendly, then you can use.
well if the users on her blog are known for abusing her advertisements, you shouldn't post on her blog. you will risk your adsense account as well.
yes,... coz your friend lost his account coz click fraud, it will same happen to your account,...have fun with that