UBS Financial Services is a major name in the world of wealth management, and for over two decades, one of its San Juan, Puerto Rico-based advisors, William Medina, has been a registered broker and investment advisor with the company. However, a pending complaint filed in December 2025 has cast a spotlight on this otherwise established financial professional. The case, which revolves around alleged unauthorized withdrawals from a customer’s investment account, raises broader conversations about trust, fiduciary responsibility, and what investors should know about working with financial advisors.
The Allegations: When Trust Meets Betrayal
Money management is an arena built entirely on trust. When investors choose a professional like William Medina (CRD# 2744961), they do so expecting guidance, protection, and a watchful eye over their life savings. In this case, according to a formal complaint currently pending before the Financial Industry Regulatory Authority (FINRA), that trust may have been deeply compromised.
The December 2025 complaint alleges that William Medina colluded with a client’s ex-wife to empty the client’s investment account by authorizing a series of unauthorized fund transfers. Although the details are yet to be fully disclosed and the complaint remains pending as of January 2026, the gravity of the allegation cannot be understated. The investor asserts that not only were their funds transferred without consent, but that their own advisor—someone charged with safeguarding their interests—was an active participant in these alleged unauthorized transactions.
Current disclosures show this is the only customer complaint recorded for William Medina in an otherwise clean 26-year career. Damages have not yet been specified, and it’s important to note that Mr. Medina has not been found liable or responsible at this time. Being the subject of an unresolved customer complaint does not prove wrongdoing, and every advisor is entitled to due process.
The Advisor’s Background: Experience and Credentials
Understanding who William Medina is requires a look at his professional history, which shows an impressive track record in the financial industry. He is currently dually registered with UBS Financial Services as both a broker (since 2002) and an investment advisor (since 2018). His résumé includes prior associations with respected names such as Samuel A. Ramirez & Company, Norwest Investment Services, Wells Fargo Securities, and Clark Melvin Securities Corporation.
| William Medina: Professional Overview | |
|---|---|
| Current Firm | UBS Financial Services (Broker since 2002, Investment Advisor since 2018) |
| Past Firms | Samuel A. Ramirez & Company, Norwest Investment Services, Wells Fargo Securities, Clark Melvin Securities Corporation |
| Securities Examinations Passed | Series 3, Series 7, Series 63, Series 65, Series 66, SIE |
| State Licenses | California, Florida, New Mexico, New York, Puerto Rico, Texas, Virginia, Wisconsin |
| Disclosed Complaints Prior to 2025 | None |
This record showcases a breadth of experience, multi-state licensure, and passage of essential industry examinations. In fact, before the December 2025 complaint, William Medina’s record was free from regulatory actions, customer disputes, arbitrations, or settlements—a testament to what had seemed an unblemished professional history.
As the late Warren Buffett famously stated, “It takes 20 years to build a reputation and five minutes to ruin it.” Financial advisors, regardless of tenure or credentials, must be vigilant about transparency and ethical conduct at every step.
What Rules Govern Advisors Like William Medina?
Financial professionals in the United States are bound by a mosaic of regulations designed to protect investors from misconduct, fraud, and breaches of trust. Two key rules are particularly relevant when allegations about unauthorized activity arise:
- FINRA Rule 3260: Governs discretionary trading accounts. Advisors must have written client authorization and firm acceptance to execute trades on a client’s behalf, and these powers are tightly circumscribed. Discretion does not mean carte blanche over a client’s funds.
- FINRA Rule 2010: Requires that members observe the highest standards of commercial honor and just principles of trade. This encompasses not only formal rules, but the very spirit of ethical conduct—no unauthorized transactions, no conflicts of interest, and certainly no collusion with third parties.
In practical terms, if you trust someone to manage your portfolio or your property, the expectations are clear: they act solely in your interests, not those of others. And if anything goes awry—especially involving family or divorce—strict protective protocols must be followed for any changes in account access.
Investment Fraud: A Broader Industry Concern
While cases like the one involving William Medina are relatively rare, they raise awareness about broader investment fraud risks in the financial advisory industry. Recent studies reveal that nearly 7% of financial advisors have at least one disclosure of potential misconduct on their records (Investopedia: What Is Investment Fraud?). Common examples include unauthorized trading, unsuitable recommendations, and outright misappropriation of client funds. In 2023 alone, the SEC reported over $5 billion in investor funds were lost to various forms of investment advisor fraud and unsuitable advice. Bad advice itself isn’t always criminal, but advisors are expected to recommend investments that suit their clients’ financial goals, risk tolerances, and time horizons.
It’s important for clients to differentiate between honest mistakes and clear violations. Allegations that an advisor worked with a client’s ex-spouse to siphon funds, for example, cross into the most serious category of misconduct: a direct and knowing breach of fiduciary duty.
Potential Consequences for Advisors Facing Complaints
If FINRA finds the complaint against William Medina substantiated, the ramifications could be significant for both the advisor and his firm. Potential outcomes include:
- Arbitration awards requiring the advisor to pay compensation to the client
- Disciplinary actions such as fines, temporary or permanent suspension, or an industry ban
- Enforcement actions by the U.S. Securities and Exchange Commission (SEC)
- Severe reputational harm and loss of client trust
UBS Financial Services, like all major broker-dealers, is required to monitor and supervise its representatives. If any gaps in oversight are identified as part of this complaint, it may also lead to stricter internal controls and procedures across the firm.
Lessons for Investors: Protecting Yourself
Regardless of how the complaint against William Medina is resolved, every investor can benefit from reviewing best practices for protecting their finances and relationships with advisors. Here are five essential tips:
- Regularly review your account statements for any unrecognized activity or unauthorized withdrawals.
- Question any transaction you don’t recognize, whether it’s a check, transfer, or wire.
- Check your advisor’s FINRA BrokerCheck record for any new disclosures, complaints, or regulatory events.
- Be especially vigilant during periods of family change (like divorce), when account ownership and access can shift, sometimes without your knowledge.
- Document every request and authorization made about your accounts, and never sign blank or unclear forms.
For those seeking guidance on how to handle suspicions about their advisor or file complaints, resources like https://financialadvisorcomplaints.com/article-correction-update/ and provide you name, address, email, and telephone contact for follow-up reporting, along with the back-up for any updates. The publisher strives to provide the most up-to-date and most accurate report regarding all issues and events, and welcomes input from any individuals with personal knowledge.
DISCLAIMER: The information herein is derived from public sources and is provided "as is" without warranty of any kind. Legal matters may have subsequent developments, and market values may fluctuate. While we strive for accuracy, we make no representations about the completeness or reliability of this information. Readers should independently verify all content and seek professional advice as needed.
