Answer:
(Fatwa: 1006/870=B/1429)
The additional income in case of unrevealing the actual value is lawful by Shariah but since it is illegal therefore one should avoid saying something unreal:
الکذب مباح لاحیاء حقہ ودفع الظلم عن نفسہ (الشامی: 9/612)
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
