Why is this so difficult????
See here:
Exchange
Many retailers voluntarily accept returns even without the presence of a defect. The so-called right of exchange is not a legal entitlement but a return policy offered by the seller as a gesture of goodwill. The seller is not bound by the regulations of warranty law.
If the seller offers a right of exchange, they are only bound by their own conditions. Thus, the exchange frequently only takes place through a merchandise voucher.
If the seller does not generally offer a right of exchange, it can also be agreed upon at the time of purchase. The retailer is bound by a right of exchange agreed upon by their employees.
For evidentiary purposes, the right of exchange should generally be recorded in writing. For this, a corresponding note by the seller on the receipt is sufficient, for example. It is important to clarify fundamental questions, such as the exchange period, refund of the purchase price in cash, voucher, or other goods, and the damage to seals or original packaging.
Lawyers and notaries
There, the warranty law is described once again, which we all agree with and which is as described (without receipt with witness).
Is that finally enough???
For an exchange due to no longer liking the item, I need a receipt because IKEA wants it that way!!! Period.