The UK Gambling Commission (UKGC) has warned online gambling operators to stop permitting customers to fund their accounts via e-wallets that allow credit card gambling.

On Wednesday, the UKGC issued “guidance on credit card payments made through Money Service Businesses (MSBs).” The UKGC apparently felt the need to clarify that when it said it was banning gamblers’ ability to fund their online accounts via credit cards, it wasn’t joking.

The UKGC said the intent of the credit card ban was to “maximize the levels of friction during the process of accessing and using borrowed funds for gambling” to protect consumers from racking up major gambling debts by spending money they didn’t have.

When it launched its credit card gambling consultation last July, the UKGC noted that e-wallets could be used to circumvent a credit card gambling ban, necessitating cooperation between numerous segments of the online payments sector.