Best Practice: Maintaining SAP licenses
If you refresh you QA system regularly from your production system, one of the repeating tasks is installing the SAP license for the new SID and hardware-ID.
Since you can store more than one SAP license in the SAP database, you can (and should) store the SAP license for your QA system in the production system too. Voila, if you refresh the QA system, the correct license is already installed.
I also stored all my SAP licenses in our group directory as scripts (calling saplicense -install). That way it is very easy to install the license again or into another (new) SAP system. SAP seems to encourage to use transaction SLIC, but scripts are far more repeatable.
SAP recommends to use transaction SLICENCSE instead.