In A Forgiving God in an Unforgiving World, Ron Lee Davis retells the true story of a priest in the Philippines, a much- loved man of God who carried the burden of a secret sin he had committed many years before. He had repented but still had no peace, no sense of God’s forgiveness.
In his parish was a woman who deeply loved God and who claimed to have visions in which she spoke with Christ and he with her. The priest, however, was skeptical. To test her he said, “The next time you speak with Christ, I want you to ask him what sin your priest committed while he was in seminary.” The woman agreed. A few days later the priest asked., “Well, did Christ visit you in your dreams?”
“Yes, he did,” she replied.
“And did you ask him what sin I committed in seminary?”
“Yes.”
“Well, what did he say?”
“He said, ‘I don’t remember'”
What God forgives, He forgets

David H. Bolton – quoted off the Internet

And another version:
A few years ago, rumors spread that a certain Catholic woman was having visions of Jesus. The archbishop decided to check her out.
‘Is it true, m’am, that you have visions of Jesus?’ asked the cleric.
‘Yes,’ the woman replied.
‘Well, the next time you have a vision, I want you to ask Jesus to tell you the sins that I confessed in my last confession. Please call me if anything happens.’
Ten days later the woman notified her spiritual leader of a recent apparition.
Within the hour the archbishop arrived. ‘What did Jesus say?’ he asked.
She took his hand and gazed deep into his eyes. ‘Bishop,’ she said, ‘these are his exact words: I CAN’T REMEMBER. ‘

Brennan Manning,The Ragamuffin Gospel: Good News for the Bedraggled, Beat-Up and Burnt Out (Portland, Ore.: Multnomah Press, 1990), 116-117