What is the ruling on writing "Goods sold are not returned or exchanged," especially if they are undergarments that may carry skin diseases after being tried on?

Scholars have agreed that prohibiting the phrase "Sold goods are neither returned nor exchanged" on sales invoices is to nullify the option of returning goods due to a defect. Thus, the buyer has the right to return an item if a defect is found, even if the seller was not aware of it beforehand.