Think Build Implement Repeat
London, UK +44 7367 067226
WhatsApp FOLLOW f in X
  1. Home
  2. Blog
  3. How Do We Onboard New Suppliers to Our B2B Marketplace Without Weeks of Chasing Documents?
Problems We Solve

How Do We Onboard New Suppliers to Our B2B Marketplace Without Weeks of Chasing Documents?

B2B marketplaces leave signed suppliers waiting to go live while insurance, payout details and certificates are chased. We build onboarding that clears them.

Updated 3 min readBy SpiderHunts Technologies

Free estimateNo obligation

Get a free estimate

Tell us what you need. A senior engineer reads every enquiry.

Takes under a minute. We never share your details.

  • Free consultation
  • No commitment
  • NDA on request

Prefer to talk? Book a free 30-minute call →

Quick answer — TL;DR

Supplier onboarding stalls because every supplier needs company checks, bank details, insurance and product certificates, each arrives by email in its own format, and the onboarding team tracks progress in a spreadsheet. We build an onboarding flow where suppliers upload everything in one place, documents are read and checked automatically where possible, gaps are chased on a schedule, and only decisions go to your team.

Forty suppliers signed up, six live

Your sales team has had a good month recruiting suppliers. Forty businesses have agreed to list on the marketplace. Six are live. The rest are somewhere in onboarding: waiting for a company registration check, bank details that do not match the company name, an insurance certificate that expired last month, product certificates in a language nobody on the team reads, a signed seller agreement that went to the wrong director.

Your onboarding coordinator is managing all of this from a shared inbox and a spreadsheet with a column for each document. Suppliers who were keen at signing are going quiet.

Why onboarding drags

A B2B marketplace takes on more responsibility than a consumer one: trade buyers expect suppliers to be real, solvent, insured and compliant with the rules for their products. So you ask for more: company and VAT registration, beneficial owners, bank account verification for payouts, insurance, and category-specific certificates. What you require is your policy, set with your advisers; the problem is the process around it.

Documents arrive by email, in batches, some wrong, some partial, and each has to be opened, checked and logged. Suppliers do not know what is still missing, because the list lives in your spreadsheet.

Onboarding itemUsual delay
Company and VAT registrationName on application differs from registered name
Bank details for payoutsAccount name does not match the company
Insurance certificateExpired, or cover not what you require
Product certificatesMissing for some categories, unclear scope
Seller agreementSigned by someone without authority, or not at all

What slow onboarding costs

Every supplier waiting in onboarding is catalogue you do not have and sales you are not making, while buyers look elsewhere. Suppliers lose enthusiasm, and some withdraw. Your team spends its days opening attachments and writing chase emails rather than helping suppliers list good products.

Rushing it has its own cost: a supplier approved with the wrong bank details or an expired certificate creates problems later that are much harder to fix.

The onboarding flow we build

  1. Supplier checklist: each new supplier gets a secure onboarding page showing exactly what is required for their business type and categories, and what is still outstanding.
  2. Document reading: uploaded documents are read to extract names, numbers, dates and scope, and checked against the application, such as company name, registration number and expiry dates.
  3. Registry checks: UK company details are checked against Companies House, and VAT numbers against HMRC's VAT number check where applicable; other checks, such as sanctions or identity, use the provider you choose.
  4. Bank verification: payout bank details go through your payment provider's verification, such as Stripe Connect onboarding or a bank account name check service, before payouts are enabled.
  5. Automatic chasing: suppliers with outstanding items receive reminders listing exactly what is missing, and the sales contact who recruited them is told when a supplier stalls.
  6. Review queue: your team sees only items needing judgement, such as a mismatched name or an unusual certificate, with the document and the check result side by side, and approves each supplier to go live.

Which checks you run and what counts as a pass is your policy. The flow applies it consistently and keeps a record of every decision.

Onboarding week to week

Suppliers know what is missing without emailing to ask. The onboarding coordinator works a queue of decisions rather than a spreadsheet of attachments. Documents with expiry dates, like insurance, are recorded with those dates so they can be re-requested before they lapse. Sales can see where each new supplier is stuck.

Is supplier onboarding your bottleneck?

  • Signed suppliers take a long time to go live.
  • Onboarding progress is tracked in a spreadsheet.
  • Suppliers keep asking what is still missing.
  • Bank detail mismatches are found after payouts are set up.
  • Certificates with expiry dates are not tracked after onboarding.

FAQ

Frequently asked questions

The questions readers ask us after this guide.

Still have a question?

Ask us directly — a senior engineer will get back to you.

Ask about your project

Do you decide what checks suppliers must pass?

No. Your policy, set with your advisers, decides. We build the flow to apply it and record every decision.

Can this connect to our marketplace platform?

Yes, if the platform has an API or supports seller onboarding hooks. The supplier's status can be set to live automatically once approved.

What about suppliers outside the UK?

Company and tax checks vary by country. We use registry or verification services where they exist and route the rest to your team.

Can suppliers onboard in stages and list products early?

If your policy allows it, yes. The flow can allow catalogue preparation before approval while blocking sales and payouts.

Keep reading

More on Problems We Solve

Start here

Tell us where your marketplace operations get stuck

Describe how suppliers and trade buyers use your marketplace, the platform it runs on and where your operations team loses time. We will tell you what we would build, what needs a person's judgement, and if your platform already has a feature that covers it, we will point you to it.

  1. You tell us what you needTwo minutes on the form, or a message on WhatsApp.
  2. A senior engineer reviews itAnd comes back with questions, a realistic range and an honest view on fit.
  3. Free 30-minute scoping callWe talk through scope, options and a realistic estimate — with no obligation.
Free estimateNo obligation

Talk to someone who builds this

Send a short brief and we will come back with an honest view and a realistic range.

Takes under a minute. We never share your details.

  • Free consultation
  • No commitment
  • NDA on request

Prefer to talk? Book a free 30-minute call →