Do collection agencies report to the credit bureaus?
I have a couple of credit card charge-offs on my credit report, but I have been paying on them through collection agencies. Do those ever show on your credit report?
If you pull your credit report from http://www.annualcreditreport.com you will probably find that these debts are already listed.
You will also find out that once you have paid them, they will continue to stay there as a negative item. Normally, once a debt is paid all the collection agency does is put "paid" on your history. But it will still reflect that it was in collections or had late payments.
If the reason you are paying these bills is to improve your credit, you need to contact the collector and have them agree IN WRITING to delete the entry once it has been paid off. Otherwise, you are just throwing away your money.