We often use new sheets to print them. When I shop, at least 1 order out of 20 (or more) comes with used sheets. So it’s very rare for people to reuse sheets. A simple but still economical tip.
Feel free to reuse old sheets: old notes, old drawings, cover letters, photos, ads, etc. As long as it’s not important documents with your addresses, etc., it’s fine (and at worst, the sheet can be turned over if there’s a name or email address).
On Vinted: The shipping label takes up almost the entire sheet (at the bottom there’s the slip to put in the package, you can write a little note) the white part can be reused for a shopping list, for example.
Print in black and white with fast printing. As long as the barcode is readable, there will be no problem (you just need to be careful to stick it on correctly!)
no, never and it has never caused a problem - I have sent more than 1700 packages
besides, you will notice that with vinted go, there is no additional page