I have done this with my JPM Palladium card. I have a limit of $100,000 but recently needed to charge $125k on the card. I spoke with a supervisor and they essentially moved $25k from my chase checking account so i had a credit on my Palladium card. The charge didn't go through the first time but I kept the supervisor on the line while the vendor tried again and it worked.

I have a long standing relationship with Chase and a decent amount of assets householded with them.

At the end of the call the agent also said 'congratulations, you will earn a UR bonus for spending over $100k in the year' Oh really?