For years I have battles with clients who have taken it upon themselves to weigh in daily, or in extreme cases multiple times per day. Drives me nuts.
The deal is scale weight can fluctuate greatly based on several factors including water retention and matter retention (poop). So weighing yourself constantly is kinda dumb. I recommend weighing yourself at MOST once per week. Make it the same day of the week and the same time of day. That way you can get the most accurate and consistent reading possible. Even then nothing is 100%, but so long as there is a downward trend (assuming you are trying to lose fat) then your you are doing fine.
