Credit bureaus collect data independently of each other – and they typically don't share it. Not only that, your creditors and lenders might report data only to one or two of the credit bureaus. So, your Equifax, Experian, and TransUnion credit reports might all look different from each other.
Each credit bureau calculates your credit score with the data in its credit file. For example, Experian calculates your credit score with the data in your Experian credit report. So, if you have a collection account that appears on your TransUnion credit report, but not on your Experian credit report, then your TransUnion credit score might be lower.
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