@cindy-ywcamankat
I find it easiest to create a bank or other current asset account for the cards. You can create one account for each card or combine all cards into one account, depending on how many there are and what works best for you. To add the starting balance to each card, create a Transfer (Create > Transfer) and move the funds from the business bank account to the cards. Then, when the cards are used to cover expenses at the conference, create Expense transactions (Create > Expense), and use the bank/other current asset card account as the payment account. This way, you will always have the correct available balance in the card bank/other current asset account.
It's important to know that there was no expense when the cards were purchased. That's why the starting balance is created using a transfer. The expense is incurred when the cards are used to pay for legitimate expenses at the conference.
