Having a child with learning disabilities is really hard. It affects every aspect of your life and it is exhausting. Stealing from those children is reprehensible. If you have people in your life who suggest dishonesty to promote thievery, you might want to seriously question their judgement and trustworthiness in other matters as well. Lying is not a skill I want to model for my child nor is the sense of entitlement that says if I can get something I want it's okay to do anything to get it including lying or taking resources from others. I hope you have better judgement than those who are advising you...and I actually think that you indicated you do. I think you are asking the question because your conscience is telling you that it would be wrong to pursue a fake diagnosis. Do what you know is right, take the sage advice here to address the REAL problems, and enjoy a REAL solution and a clear conscience.