Independent payments advisory
Payments infrastructure for complex commerce.
Greyhaven advises high-growth and complex businesses on acquiring, processing, banking, risk and payment performance. We help merchants build resilient payment infrastructure designed to scale.
Multi-acquirer strategy
Regulated & high-risk expertise
Domestic + international
Ongoing payments optimization
What we advise on
Built for businesses where payments are mission-critical.
We work with high-growth merchants, eight- and nine-figure commerce businesses and complex or regulated business models where payment performance is an operating constraint rather than a procurement line item.
Acquiring & Merchant Accounts
Identify acquiring partners aligned with your business model, geography, volume and risk profile.
View scopePayments Strategy & Optimization
Treat the payment stack as an operating system, not a vendor contract. This is where advisory separates from agency.
View scopeRisk & Chargebacks
Elevated dispute levels can translate into higher processing costs, reserve requirements and tighter controls. We build the program before that happens.
View scopeBanking & Reserves
Reserves, caps and settlement terms often matter more to cash flow than the rate on the statement.
View scopeOngoing Payments Advisory
Your external payments team. A continuous review cycle across the metrics that decide whether the stack holds.
View scopeProblems we solve
When payments become infrastructure.
Your processor has introduced a rolling reserve.
You are approaching volume limits with your current acquirer.
Approval rates have declined without a clear explanation.
You need a secondary processing relationship.
You are entering a new geography or product category.
Your business has been classified as high-risk.
You are overly dependent on a single payment provider.
Chargebacks are threatening your acquiring relationship.
You need to evaluate competing acquiring proposals.
Your payments stack has become too important to manage reactively.
Greyhaven helps merchants address these challenges before they become constraints on growth.
Methodology
Assess → Architect → Place → Optimize.
Assess
Understand the merchant's current payment infrastructure, economics, risk profile, constraints and objectives.
Architect
Design an acquiring and payments strategy around resilience, performance, scalability and redundancy.
Place
Identify and evaluate appropriate acquiring, processing, banking, gateway and risk partners.
Optimize
Continuously evaluate approval rates, costs, reserves, chargebacks, routing and overall payment performance.
Primary engagement
Payment Infrastructure Assessment
A structured review of your current payments environment designed to identify infrastructure risk, performance gaps and opportunities for improvement.
Acquiring and processor relationships
Approval and decline performance
Processing economics
Rolling reserves and settlement terms
Chargebacks and fraud exposure
Gateway and routing architecture
Volume caps and concentration risk
Geographic and vertical exposure
Redundancy and business continuity
Opportunities for alternative acquiring relationships
Deliverable
Merchants receive a clear assessment of their current environment, key risks and recommended payment architecture.
Why Greyhaven
Independent advice. Built around the merchant.
Traditional payment providers are incentivized to sell their own infrastructure. Greyhaven evaluates the merchant's broader payment environment and helps determine the appropriate strategy across multiple providers and relationships — with commercial relationships disclosed where they apply.
Independence
Recommendations based on the merchant's requirements rather than a single processor or acquiring platform.
Specialization
Focused on businesses where payments are complex, regulated, high-risk, high-growth or operationally critical.
Continuity
Infrastructure designed to reduce dependency on any single acquiring or processing relationship.
Concentration risk
Your payments stack shouldn't depend on one provider.
Growing merchants can become overly dependent on a single processor, acquirer, gateway or banking relationship. When that relationship changes terms, introduces a reserve or exits the category, revenue is exposed immediately. We evaluate the structure before that happens.
- Primary acquiring
- Secondary acquiring
- Gateway redundancy
- Payment routing
- Banking relationships
- Geographic diversification
- Business continuity planning
Core specializations
Complex commerce.
Banking appetite and underwriting requirements vary by business model. We evaluate each company individually and identify appropriate processing options — we never guarantee approval.
Regulated & High-Risk Commerce
Categories where underwriting, documentation and acquirer appetite govern what is possible.
Nutraceuticals & Supplements
Claims review, rebill structure and descriptor discipline as underwriting variables.
Peptides & Research Products
A narrow band of acquirer appetite that rewards compliance posture and redundancy.
Subscription & Continuity
Authorization health, retry logic and billing continuity across every cycle.
CBD & Hemp
Testing documentation, jurisdictional footprint and domestic versus offshore trade-offs.
High-Ticket Ecommerce
Per-transaction caps, issuer friction and authorization strategy at large order values.
International & Cross-Border
Local acquiring, settlement currency and payment-method coverage by market.
Complex Ecommerce
Platforms, split settlement and multi-entity structures with layered liability.
Engagement models
How we work.
Advisory
Independent analysis of acquiring strategy, payments architecture, economics, risk and performance.
Placement
Structured evaluation and introduction to appropriate acquiring, processing, banking, gateway and risk partners.
Ongoing Advisory
Continued oversight of payment performance, provider relationships, redundancy and infrastructure as the business scales.
Research
Greyhaven Intelligence
The High-Risk Acquiring Landscape
How acquirers, ISOs, sponsor banks and gateways divide responsibility — and where merchant leverage actually sits.
Building a Multi-Acquirer Payments Strategy
What it takes to run two or more live acquiring relationships without fragmenting reporting, risk or reconciliation.
The Real Cost of Rolling Reserves
Modelling reserve percentage, hold period and release schedule as a cost of capital rather than a line item.
Why Merchants Should Monitor Acquirer Concentration Risk
Single-provider dependency is the most common structural risk we see in businesses above eight figures of volume.
Payment Infrastructure Assessment
Build a more resilient payments stack.
Tell us about your current environment and we will return a written assessment of risk, performance and recommended architecture.
Request an Assessment