CBA is offering NAB customers $1200 to refinance their home loan. To open a credit card or deposit account, CBA is also offering NAB customers $100.
I cannot find it on the website so I have provided a link to an article in The Age.
http://www.theage.com.au/business/cba-tempts-nab-customers-w…
I did it today. Just showed them my Nab card and thts all so i didnt need to close my nab account. Only condition was to deposit $500 in the CBA account.