How specific must a contract be?
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<p>This is what is in my terms and conditions... Someone is trying to get out of paying (of course I will be writing a proper contractual agreement after this) but how valid is my argument for having them pay?</p>

<p>The question does  not say what reasons the other party gives for not paying, and so one cannot judge whether such reason is covered by the terms quoted in the question.</p>
<p>In general a contract need not be highly specific if the intent is clear. However, any ambiguity  will usually be resolved against the party who wrote the contract, so it is in that party's interest to be as clear and specific as possible.</p>
<p>It is not clear from the quoted terms that they form a contract at all. No consideration is stated.</p>
<p>Contractual provisions which deny all recourse are not always enforceable. They may be overruled by law or regulation, or by prior court decision or by an equitable decision. If there is a serious problem with the service provided, particularly in a consumer transaction, a court might reject a provision denying all refunds even if it is quite specific and clear.</p>
<p>The question does not list the jurisdiction (country and, for federal countries, state or province). Laws on contracts  and enforceable terms vary significantly  in different jurisdictions. Without this a specific answer is not possible.</p>

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