IF send the item just regular letter mail without tracking number to prove it is delivered, how can ebay judge the time of it is delivered and will hold my fund how many days ? thanks.

If I send the item is letter mail without tracking number to prove, how many days ebay hold my fund? | Selling

If I send the item is letter mail without tracking number to prove, how many days ebay hold my fund? | Selling | eBay Canada EN