The investment migration industry has a marketing problem: it presents due diligence as something that happens to less scrupulous applicants. The implication is that a straightforward, wealthy investor will sail through it. This framing is inaccurate. Due diligence in reputable CBI and RBI programs is genuinely rigorous, and it routinely surfaces complications that delay or prevent otherwise qualified applicants from succeeding.
Understanding what programs actually check, how the process differs between Caribbean CBI and European RBI, what triggers elevated scrutiny, and what causes outright rejections is essential information before committing to an application and paying a non-refundable agent retainer.
The Two Levels of Due Diligence
All credible investment migration programs conduct due diligence at two distinct levels:
1. Government due diligence: The national citizenship or immigration authority reviews the application against its own database and engages third-party verification firms to conduct background checks. This is the formal institutional process. The government makes the final decision.
2. Agent pre-screening: Licensed agents who submit applications to government programs conduct their own pre-screening before accepting a client. An agent who submits an application that fails due diligence damages their relationship with the citizenship unit and their licence. Competent agents reject applicants during pre-screening, not after submission.
The practical consequence: if you approach a credible licensed agent with a complex history, expect them to conduct their own assessment before agreeing to submit your application. An agent who accepts all comers without pre-screening is either inexperienced or has less to lose — both of which are indicators of programme and outcome quality.
What Is Always Checked
Regardless of program, every credible CBI and RBI due diligence process checks the following:
Criminal record: Clearances from every country where you have resided for 12+ months in the past 10 years. Most programs also check countries of citizenship, even if you have not lived there recently. Criminal convictions — including spent convictions, cautions, and civil judgments that have equivalent weight — must be disclosed. Non-disclosure is typically an automatic disqualification and may constitute fraud in the application jurisdiction.
Sanctions screening: Your name, date of birth, and associated entities (businesses, family members in some programs) are checked against:
- OFAC (US Office of Foreign Assets Control) sanctions lists
- EU sanctions lists (asset freezes and travel bans under various EU Council regulations)
- UN Security Council consolidated sanctions list
- UK’s Office of Financial Sanctions Implementation (OFSI) list
- Interpol notices (red, blue, and diffuse notices)
A match against any sanctions list is typically an automatic disqualification. Programs do not have discretion to approve a sanctioned individual. Indirect connections — a family member on a sanctions list, a business partner with sanctions history — trigger elevated scrutiny and may not be disqualifying but require explanation and documentary evidence of arm’s-length relationship.
PEP status (Politically Exposed Person): Political exposure includes the applicant themselves, their immediate family, and known close associates. PEP screening extends to positions held in the past 5–10 years in most programs. Being a PEP does not disqualify an application, but it triggers enhanced due diligence — more documentation, longer processing times, and in some programs an escalated review committee.
Source of wealth: This is distinct from source of funds (see below). Source of wealth addresses the broader question of how you accumulated your net worth over your lifetime. Programs want to understand the general picture: years of employment income, business ownership, inheritance, property appreciation. A declaration of source of wealth that is inconsistent with the documented investment capital raises flags even if the immediate source of the investment funds is clearly documented.
Source of funds: The specific documentation chain showing where the investment capital came from immediately before deployment. Bank statements showing the transfer, the account from which it came, and the history of that account back to its source (employment income, dividend distributions, asset sale proceeds). See the section below on common complications.
How Due Diligence Differs by Program
Caribbean CBI Programs: The Most Developed Infrastructure
Caribbean programs have the deepest due diligence infrastructure relative to their size, driven by sustained pressure from the US and UK governments over the past decade. The current standard in St Kitts and Nevis, Dominica, Grenada, and St Lucia involves:
Tier 1 and Tier 2 due diligence firms: Most Caribbean programs distinguish between standard applications (processed by a Tier 2 firm) and applications from higher-risk profiles (processed by a Tier 1 firm — typically Kroll, Mintz Group, Stroz Friedberg, or equivalent). The firm assignment is made by the Citizenship Unit based on nationality, PEP status, and initial screening.
Country-specific risk tiers: Caribbean programs assign different levels of default scrutiny by applicant nationality. Nationals of countries with higher financial crime risk profiles, countries on FATF grey or black lists, or countries with geopolitical sensitivity to the Caribbean programs’ visa-free access arrangements face elevated default scrutiny. Nationals of some countries are automatically directed to Tier 1 due diligence or face programme-level exclusion.
Genuine-link assessment (St Kitts): St Kitts introduced a “genuine link” requirement in 2023, requiring applicants to demonstrate a real connection to the Federation — not just financial capacity. This is assessed through the due diligence process and can involve additional interviews or documentation requests.
For the detailed comparison of Caribbean program due diligence specifically, see Caribbean CBI due diligence compared 2026.
Portugal Golden Visa: SEF and AIMA Review
Portugal’s Golden Visa (ARI) due diligence is conducted by the immigration authority (formerly SEF, now AIMA — Agency for Integration, Migration and Asylum, following the 2023 restructuring). The investment itself is verified through the relevant fund manager or investment entity. Source of funds documentation is required for the fund subscription.
AIMA processing has been a persistent challenge. The transition from SEF to AIMA in 2023 caused backlog accumulation that has partially cleared but still produces processing times of 12–18 months on average. The due diligence itself is not the primary delay driver; administrative backlog is. Applications submitted through qualified Portuguese lawyers with complete documentation experience materially faster processing.
Greece Golden Visa: Decentralised Processing
Greece’s due diligence is conducted through the regional Decentralised Administration units responsible for the property or investment location. This creates some inconsistency in processing standards across regions — Athens applications are handled differently from Thessaloniki applications, for example. The Greek approach is thorough in terms of document requirements but has less developed third-party verification infrastructure than Caribbean programs.
UAE Golden Visa: FTA and ICP Processes
The UAE’s due diligence is conducted through the Federal Tax Authority (for investment verification) and the Identity and Citizenship Authority (ICP) for the immigration component. The UAE’s due diligence process is commercially sophisticated and processes a high volume of applications from a genuinely diverse global pool of investors. The standard of documentation required is clear and consistently applied.
Turkey CBI: Land Registry and Interior Ministry
Turkey’s due diligence involves the Land Registry (for property transaction verification), the Ministry of Interior (citizenship decision), and the General Directorate of Migration Management. The process is institutional and operates at the scale of a major economy. Due diligence is genuine but the framework differs from Caribbean programs’ specialised investment migration infrastructure.
What Causes Rejections
Criminal Convictions
Even minor criminal convictions can cause rejections in programs with strict standards. The thresholds vary:
- St Kitts and Dominica: Any conviction resulting in a custodial sentence disqualifies. In some cases, convictions resulting in non-custodial penalties require review and may still disqualify.
- Portugal: Criminal convictions for specified offences (crimes against the person, financial crimes, tax evasion above certain thresholds) are disqualifying. Minor traffic violations are not.
- Greece: Similar framework to Portugal.
Undisclosed convictions: Non-disclosure of a known conviction, whether or not it would have been disqualifying, is almost always an automatic rejection. Programmes treat dishonesty in the application as a more serious failing than the underlying conduct.
Sanctions and Adverse Media
A match against any sanctions list is disqualifying with no discretion available. Adverse media — news reports connecting the applicant to corruption, fraud, organised crime, money laundering, or other serious misconduct — triggers enhanced review and may cause rejection even without a criminal conviction. Due diligence firms conduct structured adverse media searches across local-language sources in all jurisdictions where the applicant has lived or operated.
The adverse media standard is not “proven in court.” Credible reporting of serious misconduct is sufficient to cause rejection at the programme’s discretion.
Source of Funds Complications
The most common reason for delays (and a frequent cause of rejection when not addressed proactively) is insufficient source-of-funds documentation. Common complications:
Cash-intensive businesses: Applicants who own businesses with significant cash transactions (retail, hospitality, construction in informal markets) face heightened scrutiny on the legitimacy of accumulated capital. Audited accounts and tax filings that show consistent, documented revenue over multiple years are necessary.
Cryptocurrency: Some programs accept crypto-derived capital; most require the funds to have been converted to fiat currency with clear exchange records. See second passport for crypto holders 2026 for the program-specific analysis.
Third-party funding: Applicants who have their application funded by a third party (a family member’s gift, a loan from a business partner) face complex disclosure requirements. The third party’s source of funds may need to be documented as well. Undisclosed third-party funding is a red flag.
Offshore structures: Funds flowing through offshore holding companies, trusts, or nominee arrangements require documentation of ultimate beneficial ownership throughout the chain. “The money came from my holding company in the BVI” requires documentation back through the BVI company to the individual.
PEP Complications
PEP status — whether your own, your spouse’s, or a family member’s — does not automatically disqualify. It requires additional disclosure:
- Documentation of the public office held, its nature, and the time period
- Evidence of separation from any public role (if recently ended)
- Enhanced wealth explanation linking your investment capital to legitimate income rather than the public office
- Third-party references or verification in some programs
A former cabinet minister with a clean record, documented government salary history, and legitimate private sector activity after leaving office is not disqualified by PEP status. A former official with unexplained wealth inconsistent with their public salary, or connections to contracts that attracted public scrutiny, faces a materially different assessment.
What to Do Before Applying
Run a self-assessment. Before engaging any agent or programme, review your own background as a due diligence firm would. Criminal record in any jurisdiction you have lived or held citizenship. Media coverage of your name in association with your business or professional activities. Your business partners’ and family members’ public profiles.
Prepare your documentation chain in advance. The most common delay is incomplete source-of-funds documentation. Gather three to five years of personal tax filings, audited business accounts if applicable, dividend distribution records, asset sale documentation (if investment capital includes proceeds from a property or business sale), and personal bank statements showing the flow of funds to the investment account.
Disclose proactively. If there is something in your history that will surface in due diligence, disclose it proactively to your agent and address it in your application documentation. Due diligence firms find what they look for and sometimes what they are not looking for. An application that discloses a complication with full context and supporting documentation is viewed materially differently from one that omits it and has it discovered.
Use a qualified agent. Licensed agents with experience in the programme you are applying to have dealt with complications before. An experienced agent can assess whether a complication is likely to cause rejection, advise on documentation that addresses it, and decide whether submitting is in your interest. An inexperienced or commercially motivated agent may submit regardless, wasting your time and money.
Understand the timeline implications. Complex applications take longer. Enhanced due diligence at Tier 1 firms for Caribbean programs adds 2–4 months to processing. PEP applications in Portugal can take 18–24 months. Building realistic expectations into your planning prevents decision errors — particularly around committing investment funds at a specific time or planning around a specific permit delivery date.
The Due Diligence Landscape in 2026
Several developments are shaping due diligence practices across the investment migration industry this year:
OECD automatic exchange of information (AEOI): Financial account data from over 100 countries now flows automatically to tax authorities under the Common Reporting Standard (CRS). Applicants with undisclosed offshore accounts should understand that their financial institutions are reporting to their home country’s tax authority. This is not directly a due diligence issue for the citizenship programme, but inconsistencies between disclosed wealth and CRS-reported accounts create complications.
FATF grey and black lists: Countries on FATF’s grey or black lists (currently including Myanmar, Iran, North Korea, and several African states) face blanket restrictions in Caribbean programmes. Nationals of these countries may be excluded entirely from some programmes or subject to materially enhanced scrutiny.
US and UK advisories: Both the US Department of State and the UK Home Office have issued guidance on the use of CBI passports for sanctions evasion. Programmes that have been specifically named in these advisories face reputational consequences that affect how their passports are treated at border crossings in the US, UK, and EU. Applicants should research current advisory status for their shortlisted programmes before applying.
Montenegro CBI closure: Montenegro’s EU-accession-linked CBI programme closed to new applications in the standard form. Existing holders retain their status, but the programme is no longer a live option for new applicants.
For a full comparison of programmes by due diligence standard and programme stability, use the compare tool. For Caribbean-specific due diligence analysis, see Caribbean CBI due diligence compared 2026. For guidance on how to select a licensed agent, see how to choose an immigration agent 2026.