Applying for a EU visa can be a delicate and intricate process, but it is actually straightforward if you have the required documentation and follow the necessary steps. As a guardian of a married child, you may need to provide extra documentation to prove your relationship and to demonstrate that you have the financial means to support your trip.

To apply for a Schengen visa, you will need to submit an application form, which can be downloaded from the official government website of the consulate or embassy of the country you wish to visit in your country of residence. The form must be completed in copy and witnessed by a designated representative. You will also need to provide the following documents:

• A valid passport that is legal for at least six months beyond your planned departure date from the Schengen area.
  
  
• One recent passport-sized photograph.
  
  
• A copy of your birth certificate.
  
  
• A letter from your professional organization or employer stating your position, salary, or your studies, and the purpose of your trip. This letter is sometimes referred to as a "supporting letter."
  
  
• Proof of financial means such as:
  

- Bank statements stating your account balance.
- Employment verification such as a payslip or a tax return.

• Proof of your daughter's financial means, such as her bank statements or a letter from her employer.
  
• Travel arrangements, such as a flight itinerary or a hotel reservation.
  
  

As the parent of the married daughter, you will need to provide additional documentation to demonstrate your relationship with her. You will need to provide a letter explaining your relationship, and a letter explaining your relationship with her. This letter should be signed by both you and ویزای شینگن توریستی your daughter.

If your daughter has children of her own, you may need to provide additional documentation, such as birth certificates for her children and verification of your wife's relationship to the children.

When submitting your application, you may be required to appear in person for an meeting with the embassy or consulate representative or diplomatic officer. Be sure to arrive early in the morning to avoid delays. During the interview, you will be asked questions about your trip, your financial situation, and your relationship with your daughter.

It's also essential to ensure that you have sufficient proof of the outward or return journey from the EU area, so be sure to book flights in advance.

It's usually a good idea to check with the official government agency of the country you wish to visit to confirm their specific requirements for a EU visa. You may also want to use a visa service to help with the application process.

The cost of a Schengen visa varies depending on the country and the category of visa, but it is typically between 40 and 150 euros per person, including children.

Keep in mind that the application process for a Schengen visa can take several months, and in some cases longer. Therefore, it's essential to leave enough time and apply for the visa by the recommended deadline of your trip.

By following these steps and providing the necessary documentation, you should be able to obtain a Schengen visa for your married daughter to visit her parents in the EU area.