Once the University withdraws immigration sponsorship a report is made to the Home Office against your Student visa via the online Sponsor Management System (SMS).
The Home Office will send a letter notifying you of the decision to curtail your visa to your last known address and may also email you. It is very important that you update your details with the Home Office using your UKVI account. Check both your post and your emails and keep a copy of the correspondence from the Home Office. If you have less than 60 days remaining on your current visa, we expect that the Home Office will write to you and advise you to leave before your leave expires. If you have more than 60 days remaining on your current visa, the Home Office will write to you to shorten your remaining visa time and tell you the new end date of your leave to remain in the UK. This will be the date by which you must leave the UK.
Please note sometimes there may be a delay in you receiving your curtailment letter/email from the Home Office. Therefore, you are advised to make the necessary arrangements to leave the UK as soon as possible.
Overstaying
If you continue to stay in the UK after the expiry date of your leave to remain you will become an 'overstayer'. Overstaying is a criminal offence in the UK and should be avoided. If you overstay your visa, you will have to disclose this on any future visa applications made to enter the UK.
For further information on withdrawals please see:
Withdrawal of Immigration Sponsorship