Congo Brazzaville citizens may apply for a Dubai visa online with ease via legitimate sites such as Dubai Visa Center. 

Yes, once you submit your Dubai Visa application form and it gets approved, you may easily receive a Dubai visa on the same day by opting for the urgent visa services when applying for your Dubai visa. The urgent visa services which may help you obtain your Dubai Visa in on the same day are:

1. Express service: 24-48 business hours
2. Urgent service: 7-8 business hours
3. Super urgent service: 3-4 business hours

The Embassy/Consulate may delay the processing time due to the request for additional documents, local holidays or festivals that occurred between the processing of visas without any further explanation. Kindly note that approval of urgent visa types is subject to immigration. 

Once you have submitted your Dubai Visa application form and it gets approved, you may obtain your Dubai Transit visa after 3-4 working days. However, it is also possible to obtain your Dubai Transit visa sooner by opting for any of the urgent visa services when applying for your Dubai visa. The urgent visa services available for Congo Brazzaville citizens are:

1. Express service: 24-48 business hours
2. Urgent service: 7-8 business hours
3. Super urgent service: 3-4 business hours

The Embassy/Consulate may delay the processing time due to the request for additional documents, local holidays or festivals that occurred between the processing of visas without any further explanation. Kindly note that approval of urgent visa types is subject to immigration.