1. Listen and Understand: Pay attention to the client's request and ask for details. 2. Assess Feasibility: Check if the request is possible with current resources. 3. Communicate Constraints: Explain why the request might be difficult. 4. Offer Alternatives: Suggest other ways to meet their needs. 5. Stay Positive: Keep the conversation friendly and professional.

1- Understand the customer's need behind his unrealistic customisation. 2- Be honest and realistic about this specfic product's features and capabilities. 3- Offer alternative solution that will fulfill his need if there is one you know will work , even if the solution is not a part of your portfolio, you might lose the sale but definitely you won his trust and you will be the first "go to" person for any future needs which will turn to sales with time.

I've found it helpful (depending on my work experience) that there are some clients who are not aware of the product and all its' specifications, so a good point to start is to explain the product or service to the client, then if he still had some modifications or inquiries, you should make it easier for him by bringing similar examples, (such as asking him, you want such and such, with something already available as a comparison, then you add and explain your added value to that product) and the way that you explain a product is one of the most important key points, understanding the client's requirements playing an effective role what to offer him, we can sometimes offer him a totally different product or service !

I love when this happens. This is the first opportunity to tell them no. Telling them no lets them know that you're not going to lie to them just to make the sale. Be sure that you can't do what they're asking for, of course, but then don't be afraid to use the magic no word.

Based on my experience, it's all about turning those customization talks into collaborative problem-solving sessions. When a client gets excited about possibilities, I validate their vision while gently steering the conversation toward what I know we can realistically deliver. Instead of saying "no," I usually go with something like "Here's how we can achieve something similar within our framework" or "Let me show you a creative way we've solved this for other clients." The key is to keep the energy positive while being transparent about what's truly feasible.