Funny you post this, just last week I paid my bills for the month and somehow miscalculated something on the spreadsheet I used and my payment to my Venture card was returned- I would have overdrawn my account $60 had it cleared, but didn't have overdraw protection. Luckily I still had a week and a half left before it was due and received notice both from my bank (Capital One 360) and a day later from Capital One credit cards and paid on Friday and it cleared today, before Thursday's due date. When I online chatted with them they essentially said it happens and don't worry about it. I immediately after applied for overdraft protection on my checking account should this happen again in the future.
About 2 years ago I had a Capital One QuicksilverOne (their "sub-prime" card, $500 limit) and missed the payment due date by 3-4 days. As soon as I realized, I made the payment online and called them, they were very forgiving and mentioned my excellent payment history with the secured card I had at the time going back two years. It didn't affect my CLI to $3,300 a few months later and last July they approved me for a Venture card at $15,000 limit. Overall they tend to be very reasonable and forgiving in my experience, however YMMV based on individual history. I wouldn't worry stop much if you weren't 30 day+ late but would call them regardless to explain what happened.
Hope all fairs well!
