Keep the key documents
Receipt/order confirmation, seller identity, product model and warranty are the core record set.
Store searchable copies
A consistent folder name by year or product category makes old purchases easier to find.
Keep serial numbers for durable goods
Photos of labels can be easier to retrieve than the original packaging.
Review before deleting
Some products have multi-year warranties or service lives, so the receipt may remain useful long after the return window ends.
General educational information only. Consumer rights, tax treatment, warranty obligations and return remedies vary by seller, product and jurisdiction. Use the actual contract/policy and current official consumer guidance where rights matter.