sample.pl

my %full_data = (
  'email1' => uuid4('personA'),
  'email2' => uuid4('personA'),
  'cpf' => uuid4('personA'),

  'email4' => uuid4('personB'),
  'email5' => uuid4('personC'),
);


my %new_data = (
  email => 'email6',
  cpf => 'cpf',
);

my $_flag = 0;

for my $val (values %new_data ){
  $_flag = 1 if exists $full_data{$val};
}

if ($_flag){
# match

}else{
# new

}