* Caviteño Chavacano: "Salamat"
* Zamboangueño Chavacano: "Grasias" or "Gracias"
* Cotabato Chavacano: "Salamat"
While "Salamat" is the most common, it's worth noting that "Grasias" is also widely understood.
It's best to use the specific term that is common in the area you are in or are speaking to.