The only way to do so is by buying another timeshare/deed. It may make more sense to sell your deed to buy another deed worth more points in order to avoid two maintenance fees. For example, if you have 3500 points now and want 7000 points total, you need to either buy another 3500 deed (and pay double maintenance fees) or sell/giveaway the 3500 deed and buy a deed worth 7000 points. One must weigh the financial upfront cost with the annual savings in maintenance fees.