How do we know redemption in Christ is complete?

We know redemption in Christ is complete as demonstrated by the fact that He fully satisfied the demands of the law on our behalf. This is encapsulated in the declaration of Christ on the cross, 'It is finished,' indicating that His work for our salvation is entirely sufficient. Colossians 2:14 speaks of the handwriting of ordinances that was against us being blotted out, showing that nothing further needs to be done for redemption. Thus, believers can rest assured that their sin debt has been wholly paid, and they are complete in Him.