The Baggies insist a deal to take the Argentinian midfielder to the Hawthorns fully complied with governing bodies, following allegations of a breach of regulations
Reports have emerged accusing the Premier League side of using two unlicensed agents to secure the Argentina midfielder.
Penalties for illegal transfer activity include fines and points deductions, but the Baggies have denied any wrongdoing in the capture of the 25-year-old, who moved to the Hawthorns on a free transfer from Racing Club in July last summer.
"As with all of our transfer dealings, the negotiation process regarding the signing of Claudio Yacob complied fully with all FIFA and FA rules and regulations," the statement reads.
"All negotiations were conducted and concluded directly with a FIFA-registered agent."
Yacob featured 30 times in all competitions in his debut season with West Brom, who finished eighth in the Premier League.