"DON’T PAID RENTAL BY MONDAY..."

I found a notice on the door of one of my neighbours that said, “DON’T PAID RENTAL BY MONDAY WE WILL ERASE UR CARD NO. & TRIP UR ELECTRIC. TKS U.” This is the neighbour who used to live with her son at the unit. The “CARD” seems to refer to the number of the security card assigned to her that is required to enter the building. The message is written in almost the worst Singapore-style English. Why does it have to be written in English when it is done in a very terrible way? Would it be admitted as a piece of evidence should it become a court case? The tenant may say, “I have seen the message but I couldn’t figure out what it meant because it was written in such an unintelligible way. So I ignored it.”