A single character can hold up to 40,000 caps due to the game's mechanics.
Each account can have up to 5 characters.
If you require more than 40,000 caps, you should have additional characters or spend some caps first.
Holding excess caps is not permitted, and Bethesda will remove excess caps. The buyer must bear the loss.

How to trade
When we meet in-game for a face-to-face trade, please list your items equivalent to the number of caps you've bought or 40,000 caps. If you order more than 40,000 caps, we need a few trades to deliver all caps.