Only the new cards will allow you to get into the ground, but you can either keep your old season ticket card and continue to use any money you have on it for the cashless system scheme (which is not being scrapped despite protests), or you can have your balance transferred onto the new card.
New cards should be with you before the end of July.
Ticket Office Boss, Stephen Ebanks told the club website: "The combined season ticket and cashless system has successfully been in operation for two seasons now and so we felt it was the right time to replace all the old season ticket cards with up-to-date versions.
"Supporters should be sure to keep hold of their old card until they have used up the existing balance or have had it transferred at the CCFC Superstore.
"It should be a smooth transition and we aim for there to be minimal inconvenience for supporters."