Online consultation is really difficult for friends to answer, but I suggest you ask yourself the actual situation. You can tell whether it is true or not more accurately through your actual consultation. At the beginning of your business, you rely on the style of immediate action, but you must be cautious in everything. If the client says how much deposit to pay in advance, you should seriously consider it!
Starting a business is to earn money from other people's pockets with money from your own pocket. Don't be too blind in the early stage and be eager for success. Be careful that others will take all measures against the money in your pocket.