بسم الله الرحمن الرحيم
(Fatwa: 1087/842/B=1434)
Disclosing past is neither useful nor necessary. You should speak about the current situation and qualities of the girl. In case you mention the past people would doubt unnecessarily and develop mistrust; hence you should conceal the past.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband
