No credit card required
Browse credit cards from a variety of issuers to see if there's a better card for you.
if it's the same bank, usually the credit becomes available right away.
i think it's just a lot more convenient than having to drop by a branch or mail stuff. it's easy to track too. if the mail gets lost, it's just one big mess as well.
I personally prefer to make payments using each of my credit card's website.
It helps with Citibank if you can't or don't meet the minimum balance requirement (6K) in your checking/savings account. If you make a payment directly from your account they waive the $15 monthly fee.
American Express also takes payments immediately on their mobile app. The available credit will reflect payments immediately and then the actual payment activity (balance) will reflect the next day--even Sundays!
I prefer to push payment from Wells Fargo's bill pay site because I don't have to log into every CCC's website and make individual payments. With WF bill pay, I just enter amounts and hit sumbit. Its just quicker and more convenient.
Also, I like Bill Pay better because the money is gone out of my account by the next day. Using the CCC's websites, it sometimes takes 3-4 days for the ACH payment to clear.