Citroen Xantia 1800cc 1996 - alarm problems - madtaz72

hi there can anyone help me with my uncle citroen xantia as the alarm keeps going off on its own even when driving how can i turn the alarm off for good as its getting anouing and we just want to remove it all together dose the imoberlizer go threw the alarm or is there a way to by pass it thanks madtaz