As Tartan mentioned, check the rules of the fair. Many fairs, like shows, you fill in that someone else did the LA quilting on the entry form if they dont restrict entries to be all the work of one person. Some even have different categories. Like hand quilted, machine quilted or professionally quilted. I have now seen Computer quilting starting to be a seperate category.
By all means if there are no restrictions about entering quilts that you sent out for LA quilting, enter them!
PS, make sure you let Leesa know if you ribbon. Us LAer always like to hear if a quilt we quilted ribboned somewhere