To me, the act of burning the lists is less apt than what one of my local churches has done often on Days of Reconciliation near Good Friday:
They have placed a large portable wooden cross prominently in the sanctuary. After you confess your individual sins to a priest, you are given one deep red rose. First of all, I like the color as symbolizing the blood shed by Christ for our sins. Second, what you’re supposed to “do” with that rose, after confession, is lay it at the feet of that cross. To me, that’s more spiritually powerful: it’s acknowledging the effect of our sin in the Passion drama. It’s also surrendering that sin to Christ – giving it over (which has just occurred in the sacrament). It’s also a symbol of the continuing presence of sin in our lives, and our need to lay those sins at the foot of the cross. I don’t like in the OP’s example the act of burning the sins, because that implies they have vanished. Yes, particular personal sins have vanished (&hence, I understand the “lists”), but maybe I’m just the minority of those who would do well to keep past sins in cautious consciousness, so as to be vigilant to avoid them. I know that I can be tempted too easily to repeat them, so for me, “giving them over to Christ” is more powerful, as it implies a continuing need for grace & willingness to receive that grace (against those sins).