Tradition suggests that when you lay down your token you also lay down, or offer up, the burden that token symbolised to you.
I had wanted to offer an apology to two good friends, long passed, who I felt I had failed. At the Cruz I realised that what I really wanted to do was thank them. It wasn't an apology I owed them, just my gratitude.
There are, I believe, some formulaic prayers that have been ritualised for recital at the Cruz. I feel that, as the Camino is a personal journey, the Cruz is a place for personal expression.