Pando Packages expire after after a certain number of days (depending on what type of account the sender has):

• Pando Free: 14 days
• Pando Plus: 30 days
• Pando Pro: 30 days
• Pando Publisher: never expires

If the Pando Package that you are downloading has expired, you will get a notice in a new window. Pando will try to find available copies of the file still on the network, but if that fails, you will need to contact the sender to send the files again.
You’ll get a different message if Pando looked but can’t find any copies of the file. If you click the ignore button, the Package will remain in your Received list. If you click cancel download, the listing will be removed.
(If your Packages keep expiring before your recipients get a chance to download them, consider upgrading to a Pando premium subscription. If you're the one stuck trying to download an expired Package, when you ask the sender to resend it, encourage them to think about upgrading as well!)