Use cash. On larger purchases, such as cart rental for a week or so, you will receive a 10-20% discount. I received a 20% discount at Moncho's rental this past week for paying cash. I had a flat tire on my rental and Moncho's was there in 10 minutes with another cart-no mention of a charge. If you visit often, open a bank account and get an ATM card. Belize Bank has a savings account that pays 6% interest and you can write up to 10 checks per month. Must maintain an $US500 to receive the interest.