Asking for a reduction in the interest rate on your credit card had to be one of the easiest and fastest ways to help ease the burden of credit card debt. Whilst I am sure that many institutions will not give you a reduction if you just ring them up and ask them ‘Hey, how about you reduce my interest rate.’, if you write to them about your financial position and put your case forward to them that you are possibly in (or about to be in) financial difficulty and would like their assistance in helping you meet your monthly repayments, they will probably be more likely to listen.
Again, some credit/bank institutions will not offer you anything, but some will certainly see that it is better for them in the long run if they help you manage your circumstances. Of course you have nothing to lose by asking, except for a postage stamp and possibly several percentage points to gain if they respond positively.
I’ve done this before. it works sometimes and other times not. Basically it depends on the bank and whether or not they are willing to play ball and whether or not you are willing to walk away. I ususally don’t call till i have a better offer in my hand. If they tell me no - I leave and go to the other bank.