Hi,
Receiver side there is no such intelligence provided to check payload size of which is the parity bit, as all data coming on signle line.
On both transmit and receive side we have to make sure that all the settings like no. of stop bit, payload, parity enabled has to be same.... This thing is assumed by receiver logic...and according receiver logic look for the resepctive bits...Ex. If parity is enabled on both sides then logic will check for parity....otherwise not...similarly for stop bits and paylaods.
Stop bit 1 or 1.5 basically come in picture for continuous data transfer. In such case Ex: atfer 1.5 stop bit immediately next start bit will come on Sout.
Hope you got some idea.