Fathwa - What should we recite inthe last ten days of Ramadhan?

Bismillahir Rahmaanir Raheem
Al Jawaab Wa Billahit-Tawfeeq
Respected brother,
We should read:
اللهم إنك عفو تحب العفو فاعف عني
Allahumma innaka 'affuwwun tuhibbul 'afwa fa'fu 'annee
Translation:
"O Allah You are The One Who pardons greatly, and loves to pardon, so
pardon me.". [1]
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References:
[1]
Aisha radhiya Allahu `anha,narrates that she said: "O Messenger of
Allah! What if I knew which night Lailatul-Qadr was, then what should
I say in it?" He said.- "Say.- (Allahumma innaka 'affuwwun tuhibbul
'afwa fa'fu 'annee.)
"O Allah You are The One Who pardons greatly, and loves to pardon, so
pardon me.".
اللهم إنك عفو تحب العفو فاعف عني
‎And Allah knows best