Taylor Swift can leave a "Blank Space" on a check all she wants, but she still wouldn't be able to buy her perfect wedding date from another couple at her fave venue ... so says the venue itself.
Here's the deal ... a recent report claimed the singer-songwriter wants to marry Travis Kelce on June 13, naturally, next year at Ocean House in Westerly, Rhode Island -- but that date was already held for another bride and groom.