Import documents like bills of lading and certificates of analysis aren't just customs formalities. They're your proof that the products you're selling came from a legitimate source and meet safety standards. If there's ever an issue—say, a product recall—you'll need to show where that product came from. Without proper records, you're left holding the bag.

Keep digital copies of every import document for at least a few years. Make it a habit to request them from your supplier before you place an order. If they can't provide them, that's a red flag.