Where does eBay actually show a tracking number?
In Purchase history, next to the order. eBay's own help page states you can check your order's delivery status in your Purchase history, where you'll see the item's tracking number as a link next to the item, once the seller has entered one.
Why does my eBay order show no tracking number at all?
Either the seller has not uploaded one yet, or the item was shipped as a stamped letter-class piece with no barcode in the first place. If no tracking appears, eBay tells buyers to contact the seller to ask them to add tracking, which is the sanctioned next step rather than guessing at a status.
How does eBay calculate the estimated delivery date?
From handling time and when you order, the shipping or courier service offered, and the item's location against the shipping address. eBay states expected delivery is based on working days, so weekends and public holidays aren't included in the calculation.
Can a letter-class eBay item ever have a tracking number?
Only if it moved through eBay Standard Envelope, the platform's own low-cost service for flat collectibles, which carries integrated tracking. An item mailed as a plain stamped letter outside that program has no barcode and nothing will appear in Purchase history.
When does waiting turn into an Item Not Received request?
Once the estimated or actual delivery date has passed, and no later than 30 calendar days after it, per eBay's Money Back Guarantee policy. Before that date passes, the honest move is checking Purchase history and messaging the seller through eBay Messages, not opening a case.