I went through the endorsement ordeal last year before moving to Sacramento, where I have family. Here are my in-person experiences with the BRN:
1) I applied before the online application, so my cousin was able to hand deliver my completed application to the BRN office. (I was paranoid about it being lost in the mail or in some pile of other mailed in applications.)
2) I went on a pre-move trip to scout things out and dropped by the BRN office to ask about my application status saying "missing education." The person at the window explained that that usually means your transcripts just haven't been reviewed by a human yet to verify that all the required coursework has been completed. I pressed her on the issue about whether it could mean that there were missing transcripts, so she pulled my file and was able to verify that my nursing school
was incorrect when they told me they would be able to print a transcript for me that had pre-reqs from other schools
and the grades listed.
3) I have never taken a public speaking/speech/communications class and was worried about fulfilling the communication pre-req for CA. My husband had already moved by that time, so he hand delivered a letter from my university explaining what they call "humanities" is the equivalent of freshman comp and a letter from me stating explaining what other classes I've taken that I think would fulfill the communication requirement (linguistics, literature, research, student teaching, etc.) and course descriptions for those.
He also had a signed letter from me stating his name, our relationship, and that he had my permission to be given information regarding my application. I photocopied my driver's license onto the letter for good measure. With this letter, he was able to check the status of my application with the woman at the BRN office window while dropping off my communication pre-req information.
By the way, the only real success I had was contacting the state senator and the state assemblymember for the district where my husband had already moved and I was trying to move to. Their offices contacted the BRN on behalf of their constituents (my husband and soon-to-be me) to get things straightened out. I arrived at the end of summer 2016, just in time to vote for and help re-elect the state assemblymember whose office helped me.
I did contact CNA was told that license endorsement issues with the BRN was not under their purview.