Vinay,
I hope that you are pointing towards the RELEASE attribute of the FM and not the Transpor Request.
A RELEASED FM is an indication of SAP confirmation that this FM can be used by Customer and any issues related to this FM will be addressed through SAP Notes whereas a Non RELEASED FM is not meant for Customer Usage and any issues related to this FM will not be addressed by SAP.Literally speaking there will be no support for non released FM from SAP and it's usage is at Customer's own risk.
K.Kiran.