How To Nullify Muslim Marriage Soon

My friend is staying separate from her husband for more than 3 years without any contact, sustenance and bond. She wants to do Fasaq / Talaq asap for a remarriage. Due to a shortage of Time, the Marriage was not registered in Any Municipality or Township as her husband is working in Gulf and had to return soon, on a later stage also the marriage registration did not happen. The documentation done was through the Masjid Committee of both bride and groom. What's the fastest way to End the marriage?