Yes. If a deal matters — money changing hands, work being done, property being sold, a partnership starting — get it in writing. A written contract is what a judge can actually read and enforce when things go wrong. The days of sealing a deal on a handshake are over.
It's not that people set out to cheat each other — it's that memories drift and "what we agreed to" starts to look very different once money's on the line. A written agreement fixes the deal in place; it's memorialized, so a judge can read exactly what you both agreed to. The single biggest thing people leave out is Plan B — most agreements only describe the happy path, but a good contract also spells out what happens if it hits the fan.
This matters everywhere, not just in business: put loans to friends in writing; know that an "as-is" purchase generally leaves you stuck unless the seller hid a known defect; and if you're starting a business with a partner, put the rules and an exit strategy on paper day one, while everyone's still friends. Call (870) 793-7556.