1. Funds are released when tracking shows delivery of the item to the buyer + 1 day (you as the seller add the tracking number to your transaction). 2. If you don't send trackable then funds are released at 21 days. 3. If you are selling items to be collected OR virtual items OR services where tracking is not appropriate then you can mark the transaction as processed and the buyer 'may' have the option to confirm receipt on the transaction on their Paypal account. IF the buyer agrees to do so and IF the option is available to them then funds may be released earlier for you, however that is not guaranteed. 4. If its an ebay sale then funds from ebay may be released earlier with positive feedback.
Advice is voluntary. Kudos / Solution appreciated.