When you owe some money to your original creditor and have failed to complete the payments, some collection agency will come into picture and recover money from you. How will you know that this collection agency is actually authorized by the creditor to collect money from you? You need to think deeply before you pay to any collection agency. To be sure that this collection agency is entitled to get money from you, they should provide you the copies of the legal documents you signed with your creditor. This will prove that your creditor has assigned them to collect the money.
Besides, the actual amount of debt also needs to be furnished in the details. The amount of money received so far towards this account is a part of the debt validation procedure but not the complete procedure. You should be given the accounting details of the debt including the interests and fees. Based on these details, you can review whether the fees and interest charged are at all legitimate.
When you are analyzing the deep facts, one thing can come in your mind. Make yourself sure that you owed money to the mentioned creditor only and not some other creditor for which this collection agency has been hired. Ask the collection agency to prove that they have been hired to collect debt for your creditors whom you thought and not anyone else.
Think of all these facts when you type a debt validation letter. You will have an easier time in framing the letter when you are writing to some collection agency.