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Automatic transaction on credit card to stay active
credit cards are almost never closed for inactivity. i have had dozens of cards innactive for years on end, and only one was ever closed on me for inactivity. i would bet a single 1$ transaction per calendar year would keep all your cards open.  as such, you could forget automating the process and just spend 20 minutes a year making manual 1$ payments (e.g. to your isp, utility company, google play, etc.).  alternatively, many charities will let you set up an automatic monthly donation for any amount (e.g. 1$ to wikipedia). or perhaps you could treat yourself to an mp3 once a month (arguably a charitable donation in the age of file sharing). side note: i use both of these strategies to get the 12 debit card transactions per month required by my kasasa checking account.