If a company changes its name under the same license, does it need to amend all the contracts entered?

Hello, We are starting a new E-commerce business based in Dubai and would like to know some of the legal requirements to set an e-commerce business. We'll be selling physical products, imported from China and targeting the UAE as our customer base. So please if you could help us in informing what legal procedures like licensing etc should be done. Thanks.

Dear Sir, I'm Satheesh from Abu Dhabi. For the past 3 years, I was working for a free zone company in Dubai. Our company have clients from both Dubai and Abu Dhabi and doing medical billing services for hospitals and medical centres. I was working with one of the company's clients which is a government hospital in Abu Dhabi (please note - govt is removing our company by Sept.). My concern is that the hospital is interested to recruit me as their employee. But I already signed a limited contract with my company which has "Non-competition non-solicitation agreement". My contract states that I cannot join their clients or competitors for 24 months after my visa expiry or end of service. If I violate this law they will take legal actions and they can ask for compensation (Law no. 8 of 1980 for UAE and Law no. 5 of 1985 for Dubai). My visa is expiring by Aug 25th, so I'd like to join there. Can I join this Abu Dhabi government hospital or not? If I join, is there any legal issue I have to face from my company?

Do the local sponsors have financial responsibility for bounced cheques from the company that they are sponsored? If I got cheques but they were bounced and the person who signed the cheques (managing director) left the country. Company is in labor zone, retail, 2 operating shops.

Could you tell me please, when property registration fee was changed from 2% to 4% (starting date) and by which law? Thanks in advance. Regards, Alexander