Hazrat Humaid Taveel and Harith Ghanawi (may Allah have mercy on them) differed on this matter. Humaid said: "Testimony should be brought, otherwise the hadd (punishment) will be applied." Harith said: "The woman's statement is credible, the hadd will not be applied." Then Ibn Shubruma came and was asked about it, and he supported the statement of Ibrahim (may Allah have mercy on him).
Hadith Referenceسنن سعید بن منصور / كتاب النكاح / 2192