It is true, that incorporate company in Singapore is not a difficult task. You can easily incorporate a company in Singapore within a span of one day. But there are some cases under which it may take up to the span of 14 days or even up to two months as there incorporating application needs to be judged by another government agency for the approval process as per the rules and regulations of the referral authorities.
However, on the other hand, there are chances when the registrar may refuse to register a particular company that is actually filed by a particular person under the Companies Act, where the expected company is likely to be:
If the company is actually used for unlawful purposes.
If the company is completely opposite to the national security or interest.
If the company is working against the public peace, welfare or the good order in Singapore.
There is no doubt, that the person can actually appeal to the minister, but the appeal should be made within the particular period of 30 days of the decision of the registrar. Make sure that you follow all the legal rules and regulation in this process.