Force Religion prerequisites ?

[Celtic-Soul]

Hello,
In a peace deal, what are the prerequisites to force religion ?
My neighbour has an heretic religion according to my people,
I have religious cb and my neighbour has most of his regions of the same religion than me.

why is the "force religion" button gray when making peace proposal?

Could it be that the price in administrative points is too heavy for my neigbour to convert?

The gray button gives no tips at all, which is quite uncommon in this game btw.

[Tayip]

it must cost too much warscore-over 100%

[glock30owner]

You can only Force Religion if the STATE religion is heretical to your STATE religion. The Force Religion option is not available to countries with the same STATE religion, even if some provinces may be heretical. You can not use the Force Religion option on heathen governments.

[Celtic-Soul]

I have Byzance, who's orthodox, and could force conversion for some states of the HRE but it's kinda lottery. Sometimes it's grayed, sometimes it's not at peace negociation. I now wonder if I can convert catholic states .. Maybe I only can on protestant states.

[Kelldath]

Originally posted by Celtic-Soul:

I have Byzance, who's orthodox, and could force conversion for some states of the HRE but it's kinda lottery. Sometimes it's grayed, sometimes it's not at peace negociation. I now wonder if I can convert catholic states .. Maybe I only can on protestant states.

You can convert both, but as mentioned the force conversion requires the same warscore as total annexation. If your target is not a co-belligerent, the annexation costs are doubled, and so is the cost for force conversion. You can easily go above 100% WS requirement, which will prevent you from even asking.