Someone with ftp access could indeed take malicious action - thats why we are all so jealous about guarding our passwords - once you have it you can change our sites.
TOS allows different adsense ids on different pages on the one site, although I don't think more than one is allowed on the one page.

It should be possible to contact the host and change the passwords if someone untrustworthy has access.

For static pages, you don't even need FTP access. You can just view the HTML source of a page, or even chose to "Save As" the page.

That question has been asked and answered a million times in this forum, please excert some effort to search those threads.

For static pages, you don't even need FTP access. You can just view the HTML source of a page, or even chose to "Save As" the page.

and how do you upload it to the server without FTP access?

and how do you upload it to the server without FTP access?

The way I understand the question of the OP is : someone will copy your adsense code from your pages then paste it to another site (a website of the person who copied the adsense code).

Gian04

A friend of mine owns a large website and is worried if it is possible for someone to misuse adsense code on her site?

Note the OP did say "her site" not copying it and using it on another site.

Is it possible for a third person who has access to the site's ftp details to put their own code on some of the website pages?

It is possible for that person to do ANYTHING to the site if they have FTP access. Misusing adsense code should be the least of their concerns.

OptiRex - thanks for making that point.

Leadegroot - that is exactly my concern - say a website is doing pretty well in its industry - wouldn't a third party benefit from putting in there own code to get some of the benefits of this popular site...given the fact that the ftp details fall into the wrong hands?

Or does Google have a way of predicting such fallouts and thus protecting specific sites from misuse.

Google have a way of predicting such fallouts and thus protecting specific sites from misuse

God, no! They don't care - its the the website owner's problem.
If you have reason to believe that an unauthorised person knows the access details for the website - change the password, immediately!
If this is an ongoing problem with the hosting, change hosting!
Urgently!

That question has been asked and answered a million times in this forum, please excert some effort to search those threads.

I suspect most all subjects have been covered in the forum at some time in the past, many of them repeatedly. There are very few new things under the sun.

If we were all required to first search the forum before we could post, the forum would be incredibly slow with few new threads and posts. Plus, even though old threads may be very similar there is often a small variation to the issues and the replies may be a bit different, making them somewhat unique.

contentmaster

almost anything can be done to your site if someone has ftp access. FTp access should be guarded carefully and changed often, as should all passwords.

You should also use proper passwords, not the name of someone's cat or some other such common choice.

They could do a lot of worse things than put a second adsense code on a few pages.

Any site owner needs to always know who has ftp to their site. Temporary passwords/access should be used for temporary help. If an employee is let go, all passwords should be changed.

standard stuff, protect site access very vehemently.

I don't know how quickly Google qould pick up on it, but you should always pick up on it first.

If we were all required to first search the forum before we could post, the forum would be incredibly slow with few new threads and posts. Plus, even though old threads may be very similar there is often a small variation to the issues and the replies may be a bit different, making them somewhat unique.

Trader - I couldn't have put that in a better way! I trust this forum for genuine advice from people who might have been through the same sort of problems...Webmasterworld has never let me down!

Yes, I think FTP passwords need to be well guarded...thanks again for all the inputs!