Visit Visa

Hi,
I am here in UK on Tier 1 Visa , I will be getting ILR in Feb 2015. After getting ILR I would like to invite my mother for few weeks. My father is retired and my Mother is house maker, they dont have any source of income. I send money to them every month and I will bare all expenses for UK. I send them money monthly through MoneyGram or westernUnion as these are not bank transaction there is no record on my bank statement or my mum's bank statement of these transaction , could you please let me know how can I prove that I am supporting them and also I send money to them on monthly basis. The only other thing I have is Money gram /Western Union payment receipt not sure if these are acceptable.


Thanks