Backers of the Cuban rebel leader, Fidel Castro, charged here yesterday that the Batista Administration had allowed some voters to register a dozen times for today’s elections.

They produced what they said were photostatic copies of registration cards purporting to show two such multiple registrations in Holguin, Oriente Province. Oriente is the center of rebel strength.

“Whatever the result may be, the election is a fake,” said a spokesman for the group, which is called the Cuban Movement of Civic Resistance, It is one of several organizations baking Señor Castro.

“We assume that if this multiple registration is going on in Oriente,” the spokesman said,  “There must be even more fraudulent registrations occurring in Havana, where President Fulgencio Batista is in stronger control.”

Each of the two sets of photostats showed twelve different cards with the same small photograph. In one set, a man apparently registered under twelve different names. In another set, a woman appeared to have registered twelve times.

Cuban registration cards bear a photo and prints of the index fingers of the registrant. To the casual eye, there appeared to be some discrepancy in the fingerprints on the reproduced cards. Most of the registrations on the man’s cards were dated 1951.