Do you have proof of your payment to the OC? Did you pay the OC before it was sent to the CA?
Have you heard from the CA, other than the reporting on your CR?
How long ago did you pay and when did this appear?
At any rate, I would DV the CA, send it CMRRR.
Knowing the answers above may help us direct you in case the DV doesn't get it removed from your report.
I've moved your post from General Credit Issues over here and merged it with your post on this forum, as it is a duplicate post.
We try to encourgage members not to cross post the same post on multiple forums.
I would call the acccount receivables department at the utility company, speak to a supervisor and tell them that if they don't recall immediately the account from the CA I will sue them for all the damages in case I get denied for my mortgage application, and to send you a letter acknowledging their error.
this should get them moving pretty quickly.
i would also send a DV to the CA today and a prepare an ITS for the utility company in case the supervisor doesn't act right away.
ITS= Intent to sue.
Did you pay the OC by check, CC, cash? Do you know if they transferred payment to the CA?
If the OC transferred payment to the CA, then other than possibly having a case against the CA for violations of FDCPA, I don't see you having any other reason to send ITS.
You could file ITS stating that the CA failed to notify you within 5 days of reporting(initial communications), which would be a violation of FDCPA 809, however if you paid within those 5 days, they don't have to send you anything in writing. If taken to court, it would your word against theirs whether they sent you anything or not. I think it would be a long shot and would be something you would have to decide for youself whether it is something worth pursuing or not.
You said you noticed it on December 7th, do you know when it was reported?
What date did you pay it?
ETA: Did you leave a forwarding address with the OC to send follow up bills to? Did you contact the OC after disconnect to get final bill amount?