Keep essential transaction records

After the sale, do not immediately delete everything related to the transaction.

For a reasonable period, keep at least:

• a copy or reference to the listing;
• relevant photos;
• serial number;
• final agreement;
• payment confirmation;
• receipt or tracking information;
• records of disclosed modifications or defects.

There is no need to accumulate unnecessary data. Keep what is sufficient to clearly reconstruct what was sold and under which conditions.