Whether the Amazon store registration service is trustworthy depends on multiple factors, including the reputation, professionalism and compliance of the service provider with Amazon's platform rules.

Here are some considerations to help you judge the credibility of Amazon store registration services:

1. **Reputation of the service provider**: Check whether the service provider has good reviews and reputation, and whether they have a certain reputation in the industry.

2. **Professionalism**: Find out whether the service provider has professional knowledge and experience, and whether they are familiar with Amazon's registration process and rules.

3. **Transparency**: A reliable service provider should be able to clearly explain the service process, fees and possible risks, and provide necessary documents and contracts.

4. **Compliance**: Make sure the service provider complies with Amazon's policies and laws and regulations to avoid any violations.

5. **Customer feedback**: Check other customers' reviews and feedback to understand their real experience and satisfaction.

6. **After-sales service**: A good service provider should provide comprehensive after-sales service, including answers to any questions and help during use.

7. **Fees and payment methods**: Make sure the service provider charges reasonable fees and uses a secure payment method.

8. **Risk assessment**: Evaluate whether the service provider can reasonably assess and control risks to protect your interests.

In short, when choosing an Amazon store registration service, be sure to conduct sufficient investigation and consideration, and try to choose a reputable, professional and reliable service provider. At the same time, you should also understand Amazon's registration process and rules so that you can provide appropriate supervision and guidance when necessary. Most importantly, always be vigilant and avoid any risks that may lead to account restrictions or bans.