Recently, we filed 9 separate 2015 5558s for a client, all at the same time. The confirmations that the client received had the correct EINs, but all of the PNs (plan numbers) were listed as 000. Has anyone seen this recently?. After contacting the IRS, their response was, oh well, at least you got 9 confirmations back, so you should be okay. Just checking to see if this is systematic for 2015 extensions or a one off. Thanks!