Yes, you can re-use the ISRC / UPC Codes on Spinnup when you transfer your releases to us.

ISRC Codes

To do this, simply select the option "I already have my own ISRC number" and enter your previously issued code while uploading your audio files.

UPC Code

To re-use a UPC code select the option "Show advanced release options" and enter the code.

When I enter my codes it says "This code has been previously used" what can I do?

Are you trying to use ISRC / UPC Codes that have been given to you by Spinnup? Unfortunately, it is not possible to re-use Codes that have been issued by Spinnup. 

In these instances, please select the option to get provided with a new free ISRC code, this won't have an impact on matching your plays.