Hope I post in the correct section.
Basically, I needed to return a defective item and requested for a replacement. I picked one of the options was to print the label in store (royal mail). At the till , the woman told me to scan the qr code on the machine and it printed a return label and told me there is no receipt/tracking number.
I am just concerned if the parcel goes missing then I dont have proof or comeback to say I have returned it. Please advise on what I should do?
This is the first time I have not had a receipt as i usually would have one when returning via printing label at home but this time i decided to try print in store. The woman at the till sounded she couldnt be bothered and lazy

Thank you