I requested a epic card and no one in my clan has given me one yet and 7 hours later I can request another card. THE 1st request is still up, so if I request my 2nd card will the 1st one be deleted?
TL:DR version: The previous request will gets deleted automatically when you make your other request of the day.
Last Sunday I noticed this, as we all know how Executioner is ruling the game, so many of my clan members may be 12 or 13 of them requested for him only 4 requests got filled other all went in vain.
As per the chat space the older messages and friendly battles will be automatically gets cleared but card requests will be stayed on top, so when the members who requested Executioner requested for other card after 7 hours and all the Epic card request got deleted automatically.