Most customers who want to return an item look for the same document they used to check what arrived — the packing slip. Building it with returns in mind from the start saves both sides a round of back-and-forth later.
Include the return address, even if it differs from the sender address
If returns route to a different warehouse or department than the one that shipped the order, state that clearly — customers shouldn't have to search your website separately just to find where to send something back.
State your return window plainly
"Returns accepted within 30 days of delivery" removes the guesswork and reduces support inquiries asking whether an item still qualifies.
Reference the order number prominently
Since the packing slip already carries the order number, make sure it's easy to find if a customer needs to reference it on a return form or when contacting support — placing it in small print defeats the purpose.
Consider a simple return reason checklist
A short list ("Wrong size," "Changed mind," "Item damaged," "Other") printed on the slip that a customer can circle and include with the returned item speeds up processing on your end without requiring extra correspondence.
Keep the tone helpful, not defensive
Returns policy language that reads as an obstacle course discourages legitimate returns and reflects poorly on the brand — a clear, straightforward explanation builds more trust than tightly hedged fine print.