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Vendor Onboarding for Acumatica

A new vendor fills in one page under your name: W-9, certificate of insurance, ACH form, terms. Lunica reads and checks each one, prepares the vendor record the way Acumatica wants it, and a person keys it. Certificates are watched to expiry.

Accounts payableUpdated Oct 202620 ERPs

See it work on Acumatica.

Click through the steps. Fictional data, in Acumatica’s terms; the real thing runs on Acumatica.

Vendor page · submitted Oct 15
Illustrative
Checking
Legal nameBlue Ridge Truss LLC
EIN84-2271930
Remit-toPO Box 418, Ashford
Terms offered2% 10, net 30
W-9Signed on the page · Oct 15
Certificate of insuranceCOI_BlueRidge_2026.pdf
BankACH form submitted
ContactAna Sorensen, ar@blueridgetruss.com

One page under Ridgeline’s name: W-9, certificate, ACH form, terms. It saves as they go.

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The problem, as it happens in Acumatica.

A new vendor gets set up in Acumatica because purchasing needs a PO today. The W-9 comes later, or never. The certificate of insurance is a photo of a certificate from last year. The ACH form arrives by email, gets keyed from the email, and nobody calls the bank to check the account. The vendor file has the name the buyer typed and a blank where the terms go.

In January the 1099s go out with a missing EIN. A sub’s insurance lapsed in June and nobody knew. The ACH change that came by email in August was not from the vendor. Each one is a different bad day, and each one started with a record that was never finished.

How it works.

  1. 1

    The vendor fills in one page

    A hosted page under your name, sent to the vendor from Lunica: legal name, EIN, address, the W-9 signed on the page or uploaded, certificate of insurance, ACH form, remit-to, the terms they offer. It saves as they go.

  2. 2

    Each document is read and checked

    The W-9 is read and the EIN format and name checked. The certificate is read for the insurer, the limits, the expiry and whether you’re named. The bank account is verified before it’s trusted. Anything short is asked for, on the page.

  3. 3

    The record is prepared for Acumatica

    Vendor name, remit-to, terms, 1099 flag, bank details, laid out the way the vendor file in Acumatica wants them, with the documents behind as one packet. AP checks it. A person keys it.

  4. 4

    Expirations are watched

    The certificate’s expiry is on a calendar. Before it lapses, a renewal request to the vendor is drafted; a person sends it. A bank change later goes through the same verification, never from an email.

How it connects to Acumatica.

Lunica reads Acumatica’s vendor file through Acumatica’s OData and REST endpoints, under a role that can only read, to check whether the vendor already exists, under what name and terms, and to see open POs against a vendor whose certificate is lapsing. The documents themselves live on the Lunica server with the vendor’s packet.

Nothing is written to Acumatica by Lunica, and nothing is sent to a vendor on its own. The vendor record goes back as an Acumatica API call or import scenario where one exists, or keyed by your team from what Lunica prepared. Requests to the vendor for a missing document or a renewal are drafts until a person sends them.

What a week looks like.

  • No vendor is keyed into Acumatica with a blank where the EIN goes.
  • Every certificate of insurance has an expiry date somebody is watching.
  • Bank details come through verification, never from an email.
  • The 1099 run finds every vendor already flagged.

Questions

Does Lunica create the vendor in Acumatica?

Not on its own. It prepares the record and the packet. It reaches Acumatica as an Acumatica API call or import scenario where one exists, or keyed by your team from what Lunica prepared. Nothing changes in Acumatica without a person.

Where does the vendor fill this in?

On a page under your name, hosted by Lunica, from a link your buyer or AP sends. The W-9 can be signed on the page or uploaded.

How is the bank account verified?

The bank account is verified before it is trusted, the same way the credit application verifies an applicant’s bank. A later change to bank details goes through it again.

What does it check on the certificate of insurance?

Insurer, policy type, limits against what you require, the expiry, and whether your company is named as certificate holder or additional insured.

What about vendors we already have?

A lapsed certificate or a missing W-9 on an existing vendor can be requested from the same page. The record in Acumatica is matched by name and EIN so nothing is set up twice.

Who gets told when a certificate lapses?

Whoever you enrol: AP, purchasing, the controller. The renewal request to the vendor is drafted; a person sends it.

Does it need a server?

Lunica runs on one server inside your network, whether Acumatica is in the cloud or on your own server, set up and maintained by Lunica. It reads Acumatica through Acumatica’s OData and REST endpoints, under a role that can only read. There is no inbound connection from outside your network.

What does Lunica read in Acumatica?

The customer record, open items and terms, purchase orders and receipts, the stock item, quotes and order history, as each workflow needs them. Read-only, and only the rows a task is about.

Can it post to Acumatica?

Nothing lands in Acumatica without a person. What belongs in Acumatica goes back as an Acumatica API call or import scenario where one exists, or keyed by your team from what Lunica prepared.

What about our documents?

Invoice copies and scans keep living in the files attached to the record. Lunica reads them when a workflow needs one and never writes to them.

The same workflow, on another ERP.

Vendor Onboarding is written for every system on the list. You’re reading the Acumatica version.

See it on your Acumatica data.

Thirty minutes. We walk the workflow on Acumatica data, then map it to yours.