That means a logo, a website, a set of photographs, or a body of code can be delivered, invoiced, and paid for while the copyright stays with the contractor. You hold a license to use it, often an unwritten and undefined one. The consequences arrive later rather than immediately: you want to modify the design and cannot, you want to move the code to a new developer and the original refuses, or you are selling the business and a buyer asks for proof you own your own brand. The phrase to look for is an assignment of rights or a work made for hire clause, and it needs to say the rights transfer on payment.
The second risk is classification. Calling somebody a contractor does not make them one. The IRS and state labor agencies look at the actual relationship: who controls how and when the work is done, who supplies the tools, whether the person works for others, and how permanent the arrangement is. Get it wrong and you can owe back payroll taxes, penalties, and interest, and Nevada applies its own test for state purposes. A written agreement that describes a genuine contractor relationship, and a working arrangement that matches it, is what keeps you on the right side of that line.
Beyond ownership and classification, a workable agreement covers the things that actually cause disputes. Scope, stated specifically enough that both parties would agree on whether something is included. Payment terms and a schedule. What happens when the client requests changes beyond the original scope. Deadlines and what follows if either side misses one. Confidentiality. How either party ends the agreement, and what is owed and delivered at that point. Most disagreements with contractors are not bad faith. They are two people who genuinely remembered the arrangement differently.
Use one for every engagement regardless of size. The small jobs are where people skip it, and a five hundred dollar logo is exactly the kind of asset you will still be using in five years. A short agreement covering scope, payment, ownership, and termination is enough for most work, and it can be a single page. What matters is that it is written, that it is signed before the work starts, and that the ownership clause is unambiguous. This is general information rather than legal advice, and anything with real money or unusual risk attached is worth an hour with an attorney.