3.11 Good to know — sales

An approved order is a promise with figures attached. The invoice inherits its prices and its frozen rate even if the catalogue price and the market rate have both moved since. Quote accordingly.
Credit limits are in the customer's currency, not yours. A limit that looks small in your books may be exactly what you agreed in theirs.
A manual hold never releases itself, and a financial override does not lift one. If an order will not move, read its banner before escalating — it names the reason.
Unapplied receipt money is not missing money. It is the customer's credit, visible on their record, waiting for the next invoice.
VAT follows the customer and the product together, line by line. When a line's tax surprises you, check the customer's tax position first and the product's tax code second.
Closing is not deleting. An order that will not proceed is closed; it stays readable, and its history stays auditable.
Growing depth is one-directional in the moment: a company cannot drop from [Standard] to [Simple] over open orders — finish or close the chain first (0.5).