Currently individuals are required to provide their full name (including previous names), usual residential address, telephone number, date of birth and national insurance number.
Ar hyn o bryd mae'n ofynnol i unigolion ddarparu eu henw llawn (gan gynnwys enwau blaenorol), cyfeiriad preswyl arferol, rhif ffôn, dyddiad geni a rhif yswiriant cenedlaethol.