Protecting the client
Picture a foreign buyer from Texas who falls in love with a beachfront lot in Placencia. He pays a $10,000 USD earnest deposit and signs a written Land Purchase Agreement that includes financing and title-clearance contingencies, plus a clause confirming the seller will provide proof of clear title before closing. Two weeks later, the seller's attorney discovers an old, unregistered lien from a contractor who was never paid for drainage work on the parcel — an encumbrance that should have been disclosed. Because the contract was in writing and included a title-verification requirement (exactly what the textbook says must be built into land purchase agreements), the buyer isn't stuck arguing over a verbal promise — he has clear contractual grounds to either demand the lien be cleared before closing, or invoke rescission and get his deposit back. Without a written contract, he'd have no enforceable proof the seller ever promised clear title at all, and could end up owning a lot with someone else's unpaid debt attached to it.
Protecting the agent's commission
Now picture the agent's side of that same deal. Say the agent showed the buyer eight properties over three months, arranged surveys, and negotiated the final price — but never had the buyer sign a Buyer Representation Agreement. If the buyer then goes around the agent and closes directly with the seller (or through another agent) to avoid paying commission, the original agent has essentially no legal footing — there was no written agreement establishing exclusivity, scope of services, or compensation terms. Compare that to an agent who did get the Buyer Representation Agreement signed on day one: that document — per the textbook — spells out the agent's right to commission and the exclusivity terms, so if the buyer tries to cut the agent out, the agreement gives clear, enforceable grounds to pursue damages for the lost commission, rather than just a frustrating "he said, she said."
MAIN NOTE
Writing requirements aren't bureaucratic overhead — they're what converts a promise into something a Belizean court can actually enforce (specific performance, damages, rescission, or deposit forfeiture). Verbal deals in Belize's real estate market are common and risky precisely because none of those remedies are available without a signed, written agreement.
Always WRITE and WIN.