There are a few reasons that a "Rejected" CIC may have been sent back to you.
Recipient switching data pool providers
If a data recipient is in the process of switching data pool providers, then you will receive a 'Rejected' CIC and will be directed when to republish your data to that recipient as a 'New' publication. Keep in mind that their GLN will not change in these cases - only the "controlling party" (their data pool.
Recipient does not want item published
The other instance would be if you have published a trade item or GTIN that the recipient does not want to be published to them. This is typically a situation if a private label was published to the wrong recipient.
If you still feel you might be receiving "rejected" status in error, please reach out to us or the recipient you are attempting to publish your data to.