I went to Batam with my maid last Friday to make her KTKLN card. The location of the place is about 10 mins drive from the Batam Centre Ferry Terminal. The process took about 45 mins but was delayed by the insurance paperwork. Card is free but insurance need to pay Rp 290,000.

You’ll need to standby 2 photocopies of the passport(maid face + tax free sticker at the last page), WP and Contract or Work Agreement which had beeb endorsed by the Indonesian emabassy.
To shine_fs it is better if u renew her WP first coz the KTKLN validity coincides with their WP. And if she does not have her KTKLN card she might get stuck at the airport.
Funny thing, the immigration officers in Batam were not very intrested with the KTKLN card. My maid showed them her Singapore WP and she cleared immigration without any problems…