Where a plaintiff brings in the same court several actions against the same defendant for claims which should have been joined, he shall recover the costs of one action only, and the costs of the other actions shall be adjudged against him unless sufficient reasons appear to the court for instituting several actions.
A.R.S. § 12-344
Costs upon splitting of action
Official source: Arizona State Legislature. Reproduced from public-domain Arizona statutes; confirm against the official source for the current text. Not legal advice.