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MS Marc Stan Book the diagnosis

Checkout & Payments Rescue

Your checkout is dropping paid-for orders. I find the cause in 48 hours and fix it — flat price.

Stripe declines, failed-payment leakage, broken subscriptions, 3DS/SCA errors, refunds that don't go through, webhooks that never mark the order paid — diagnosed and fixed by a senior engineer who runs payments on a real store every day. Flat price, proven live.

  • 2,000+ orders/mo on my own store
  • 150K visits/mo · 9+ ROAS
  • 6+ yrs production
  • 125k+ LOC WooCommerce/PHP

Every failed payment is a customer you already paid to acquire — gone at the last step

You spent on ads and earned the click. Then the payment failed silently, the subscription didn't renew, or the order never got marked paid — and the money vanished at the exact moment it was supposed to land. It's the most expensive bug in your funnel, and it compounds every day it's live.

  • Stripe declines and failed payments you can't explain
  • Failed-payment and dunning leakage — renewals that quietly don't recover
  • D Secure / SCA challenges that loop or block legitimate cards
  • Webhooks that don't fire — the payment succeeds but the order stays unpaid
  • Refunds, partial refunds and disputes that break or don't reconcile
  • Checkout drop-off where customers bail at the payment step

Payments are where 'looks done' quietly loses money

Payment flows pass a test transaction and then fail on real cards, real banks and real SCA enforcement. Generic devs and AI tools get the edge cases wrong — and you only find out when revenue dips. Closing exactly that gap is what I do.

  • Sandbox-green is not production-safe — failures surface against real banks
  • Webhooks, idempotency and reconciliation are where money silently leaks
  • A 'WooCommerce expert' is not always a payments expert — that difference is your revenue

How it works: 48-hour diagnosis, then a flat-price fix

  1. 1 Book the 48-hour diagnosis. I reproduce your failing payment and find the root cause.
  2. 2 You get a written diagnosis plus a flat fix quote ($1,200–$4,500).
  3. 3 The $450 diagnosis is credited to your fix (and refunded if I can't pinpoint the cause).
  4. 4 I fix it and prove it with a real successful transaction end-to-end.

What's included — and what's not

Stripe, PayPal and wallet (Apple/Google Pay, Link) checkout debugging and repair
failed-payment recovery, subscriptions and billing, 3DS/SCA fixes
webhook and order-status repair, refunds and reconciliation
a written root-cause report plus the fix proven live
ACH bank-transfer setup for your US customers if you want it
building a brand-new store (separate project)
full performance work (see the speed rescue) or new features
Bonus: I also handle Redsys & Bizum for European bank gateways — which most developers can't.

Flat pricing — no hourly surprises

Everyone starts with the 48-hour diagnosis, credited to your fix (and refunded if I can't find the cause). You approve a flat fix price before I touch anything.

Single-issue checkout fix

One gateway or failure fixed and proven live — Stripe declines, an SCA loop, or webhooks that never mark orders paid.

$1,200 flat

Multi-issue / tangled checkout

Several failures across gateways, subscriptions or refunds — fixed, reconciled and proven with real transactions.

$2,500 flat

Complex / subscriptions / headless rescue

Deep billing, headless or full reconciliation rescue across the payment stack.

$4,500 flat

48-hour diagnosis — first step, credited

Root-cause investigation plus a written diagnosis and a flat fix quote. Refunded if I can't pinpoint the cause.

$450 (credited to your fix)

Care plan (optional, ongoing)

Monitoring and priority fixes so checkout doesn't silently break again.

$190 / $390 / $690 per month

You take no risk on the diagnosis: it's refunded in full if I can't pinpoint the cause within 48 hours, and credited to your fix if I do. You approve a single flat fix price before any work — never an hourly meter. The only thing that isn't refundable is the revenue you keep losing while checkout stays broken.

I run payments on a real store every day — this isn't theory

I'm Marc Stan — I run the payment path on a WooCommerce store doing 100–150K visits a month, so I feel every broken checkout as lost margin, same as you. 6+ years production full-stack, 125k+ lines of WooCommerce/PHP. I prove every fix the only way that counts: a real, successful transaction on your own checkout before we're done.

  • I run live payments on a 100–150K-visit/mo store I operate
  • 6+ years production full-stack; 125k+ LOC WooCommerce/PHP
  • Stripe, PayPal, wallets and ACH — plus Redsys/Bizum for the EU
  • Every fix proven with a real successful payment on your store
Real result on a store I run: admin response cut from 3,000ms to 400ms.
Real result on a store I run: admin response cut from 3,000ms to 400ms.
A WooCommerce store I personally run: 100–150K visits/month at 9+ ROAS.
A WooCommerce store I personally run: 100–150K visits/month at 9+ ROAS.
125k+ lines of production WooCommerce / PHP, shipped against real traffic.
125k+ lines of production WooCommerce / PHP, shipped against real traffic.
You work directly with me — no account managers, no ticket queue.
You work directly with me — no account managers, no ticket queue.

Limited rescue slots — book before the bleed continues

  • A few concurrent rescues so diagnosis stays inside 48 hours
  • Same-day emergency triage via WhatsApp for active revenue bleeds
  • Every hour checkout is broken is orders you don't get back

Questions store owners and agencies ask

Do you only do Stripe?

Stripe is the core, plus PayPal and wallets (Apple/Google Pay, Link) and ACH for US customers. I also handle Redsys/Bizum for European bank gateways, which most devs can't.

Is the diagnosis really refundable?

Yes. If I can't pinpoint the cause and give you a written plan within 48 hours of access, the diagnosis fee is refunded. If I do find it, it's credited to your fix.

Can you recover failed or declined subscription payments?

Yes — dunning, retries, smart recovery and the webhook/reconciliation plumbing behind it. That leak is often the biggest and quietest one.

Will you need access to our payment provider?

Read-level access to logs and a staging/test path is usually enough to diagnose; I'll tell you exactly what I need and never log real card data.

How fast?

Diagnosis in 48 hours; most fixes 1–3 weeks depending on scope.

Stop the bleed — book your diagnosis

Send me the failing payment or the symptom. In 48 hours you'll know exactly what's broken, what it costs to fix as a flat price, and you'll have a working checkout in sight.

Simple, secure payment

Pay however suits you

Card and wallet payments are handled securely by Stripe — I never see your card details. US clients can pay by ACH bank transfer, and international clients by wire or SEPA. You get a proper invoice for every project.

Cards

Visa · Mastercard · Amex · Discover

Apple Pay · Google Pay · Link

One-tap wallets, via Stripe

ACH bank transfer

Standard US bank payment

Wire · SEPA

International bank transfer

Available for remote contracts & freelance

Talk to the engineer who'll actually do the work

No account managers, no ticket queue — you work directly with me, Marc Stan, from Las Palmas de Gran Canaria, Spain.