


INTERNATIONAL FIDUCIARY GUARANTEES
We issue guarantees with legal structure and financial backing
From initial review to notarized issuance, we build a solid, transparent process backed by collateral for transactions that require maximum security.

STRUCTURED FIDUCIARY SOLUTIONS
Available services for every type of guarantee
We provide fiduciary solutions for tax, customs, and contractual transactions, with legal structure, documentary support, and a process designed to deliver security, solvency, and traceability.
What do we offer?
Asterion Capital España S.A., a subsidiary of Asterion Capital Corp (USA), issues fiduciary guarantees enforceable in Spain and across the EU, without relying on banks or insurance companies. Our guarantees comply with Spanish and European tax regulations and are accepted by the Spanish Tax Agency, Customs, and private entities.
ENFORCEABLE GUARANTEES BEFORE THE SPANISH TAX AGENCY
Structured instruments designed for full validity and enforceability before the Tax Agency, supported by legal and documentary backing.
NOTARIZED GUARANTEES BACKED BY COLLATERAL
Guarantees formalized before a notary, supported by assets or backing guarantees that strengthen their solvency and security.
FIDUCIARY STRUCTURE GOVERNED BY CONTRACT
A fiduciary framework designed by contract, with roles, limits, and conditions clearly defined for all parties.
QUALIFIED ELECTRONIC SIGNATURE (FNMT)
Secure formalization through a qualified electronic signature issued by the FNMT, with full legal validity and traceability.
ESTIMATED ISSUANCE TIMEFRAME: 3 TO 4 WEEKS
The full process of review, structuring, and issuance usually requires an estimated timeframe of 3 to 4 weeks.
How it works
First
Application and review
We assess the legal, tax, and technical feasibility of the transaction.
Second
Formation of the fiduciary SPV
A dedicated special purpose vehicle (SPV) is established to issue the guarantee.
Third
Collateral deposit and blocking
Liquid financial assets, such as sovereign bonds or T-bills, are placed in a segregated account and blocked as collateral.
Fourth
Issuance of the notarized guarantee
The SPV executes the guarantee using a qualified FNMT electronic signature in favor of the beneficiary, whether the Spanish Tax Agency, Customs, or a private party.
Available Services
Fiduciary Guarantee for VAT – Spanish Tax Agency (Form 791)
Guarantees structured in accordance with Article 19.5 and the Eleventh Additional Provision of Law 37/1992.
Customs Guarantees – DUA
Comprehensive coverage for customs-related transactions.
Private Contractual Guarantees
For concessions, suppliers, tenders, and franchise agreements.
Fiduciary Structuring Services
Design, management, formalization, and registration of guarantees through SPVs.
Frequently Asked Questions
What type of guarantees does Asterion Capital provide?
Fiduciary financial guarantees issued through a special purpose vehicle (SPV), rather than by a bank or insurance company.
Who controls the collateral funds?
The collateral is contractually ring-fenced in favor of the beneficiary, and neither the client nor the issuer may access or move it.
How long does it take to issue a guarantee?
Typically between 3 and 4 weeks from the formal acceptance of the structure and documentation.
What documentation do I need?
Tax, corporate, and KYC/AML documentation from the applicant. All processes are handled digitally and securely.
