Which of Accounts Receivable payment terms are NOT standard in business?

Non-standard Accounts Receivable payment terms may include excessively short payment periods, such as requiring payment within a few days (e.g., Net 5), which can strain cash flow for clients. Other examples are highly variable terms based on client creditworthiness or unique service agreements, which may include unusual discounts for early payment or penalties for late payment that deviate from common practices. Additionally, terms that require upfront payment or milestone payments for long-term contracts can also be considered non-standard.