Upvote:1
UK Immigration Rules https://www.gov.uk/guidance/immigration-rules/immigration-rules-appendix-v-visitor-rules state that:
V 4.3 A visitorβs travel, maintenance and accommodation may be provided by a third party where the decision maker is satisfied that they:
(a) have a genuine professional or personal relationship with the visitor; and
(b) are not, or will not be, in breach of UK immigration laws at the time of decision or the visitorβs entry to the UK; and
(c) can and will provide support to the visitor for the intended duration of their stay.
So yes, you can state in your application that your aunt will pay the costs of your trip. She will need to provide you with documents to prove she can fulfil the commitment eg bank statements for the last 6 months, her employment contract (if she is employed). You will also need to prove the relationship between you.
You should be aware that needing a sponsor weakens your application. If you havenβt already done so, it may help you to read UK visa refusal on V 4.2 a + c (and sometimes 'e')