GEN1552 It is appropriate that the repentant right the wrong before he confesses his sins, so that his confession will find favor [before Hashem].   David [HaMelech], a”h, at the time of his repentance did just this before confessing, as the pasuk says Psalms 51:6, “To You alone I have sinned, and that which is evil in Your eyes have I done, so that You will be charitable when You speak, virtuous in Your judgment.”   The meaning of this is a follows: [In relation] to You alone I am regarded as a sinner, and I need no forgiveness other than Yours.   If I have sinned to another, I have already asked forgiveness and have appeased him.   In a similar vein [this verse], “I shall have sinned to my father for all time” – regarding this sin I will be considered by my father a sinner for all time, because he will not forgive me for it.   GATES 77