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It is less important about your documents and far more important about their evidence to show ties to home country (social, employment, income, savings, property, family etc etc).I am planning to invite my father in law and mother in law to the UK to stay with me and wife for a month. What documents do I have to provide from here and what documents do they have to submit?
There is no set maintenance fund amount. They need to show they have enough for their tripFinance - how much maintenance do they have to show in their account?