when can i handle or receiving invites on FTN after donating ...do i have to provide them with transaction details or i just have to wait

Just wait, they wait and give them at the same time I think.

Usually a member who donate and have some activity there: old, upload etc for sure get an invite. Just wait couple of days as sys0ps give invites to vips ( donors ), are handled personally not by sistem. Like they say:

Invites will be given out to members at the discretion of Staff.

After you donate post in that thread on the forum, you know wich one and can PM to a sys0p if nothing happens.

@ MidoTorrentAddict: Better don't ak staff for invites. If you do it, they can suspect you for trading/invite selling. Just be patient

Exactly, never ask them for invites.
Usually they give anyone that donates an invite but in some rare cases they don't.

Thanks Guys for all of you by the way i got only one invite now but i donated fair amount to get two but i just got one better than nothing