Some Student visa applicants do not need to provide evidence of their finances when they are applying for entry clearance in their country of nationality or ordinary residence, or for leave to remain in the UK. The Home Office calls this the 'differential evidence requirement'. Find out if your nationality is included by looking at the section ''If you're from a country listed under the 'differential evidence requirement'' on the gov.uk website.

If you qualify to apply under the differential evidence arrangement, you are not required to include the evidence finances and qualifications with your application. UKVI can request this evidence while your application is being considered. We recommend you prepare evidence of your finances, unless you have been living in the UK with permission (of any visa type) for 12 months or more on the date you apply for the visa and are making your visa application in the UK. 

If you are studying a course at degree level, you should be exempt from needing to provide evidence of qualifications in any case. If you are applying for a visa to study the International Foundation Programme or a Pre-sessional course, you should have evidence of qualifications as listed on CAS ready, in case it is requested. 

Your visa application will be refused if you do not provide the necessary documents, in the time stated, if requested by UKVI.

If you do submit documents when they are not required, they will be assessed anyway. If they do not meet UKVI requirements, your visa application will be refused.