You find a manufacturer that could buy from you. You send your details, then wait. But sending a supplier form does not mean you are approved. To get approved, you need to register your company, pass the manufacturer’s checks and get approval. Then you can supply a specific product or service to them.
The manufacturer checks many things depending on what you sell. For example, production parts will be checked for audits, MRO supplies will be checked for business details and on-site services will be checked for safety.
Different teams may review your company. These can be procurement, quality, engineering, finance, operations and safety.
Registration and approval are not always the same. And approval may also cover only one service or product supply. This guide will tell you who approves suppliers, what you need and how long it takes.
Who Actually Approves a New Supplier at a Manufacturer?
Several teams may approve a new supplier, like procurement, quality, engineering, finance, operations and safety. The person who introduces your company may not be the person who approves it.
| Function | What they check | What convinces them |
| Procurement | Price, terms, lead time, capacity | Quote, references, company documents |
| Quality | Quality system, inspections, traceability | Certificates, quality records, audit results |
| Engineering | Product fit, materials, specifications | Drawings, technical data, samples |
| Operations | Capacity and delivery | Capacity plan, delivery history |
| Finance/AP | Tax and banking details | Tax forms, bank and legal documents |
| Safety | Insurance, incidents, training | Safety records, insurance, prequalification |
The review depends on what you sell. A manufacturer may also approve you only for a specific product or plant. Oracle’s supplier system, for example, supports approvals at these levels.
Kohler’s supplier process can involve procurement, engineering, manufacturing and quality. Neapco also uses business, quality and technology assessments.
Who Starts the Process?
Procurement, sourcing, a supplier liaison or an internal employee may start the supplier approval process. Different manufacturers use different contacts. Wolters Kluwer says purchasing or a small-business liaison may handle the vendor application. General Dynamics also directs new suppliers to its supplier liaisons.
So, you need to ask these two questions:
- Who can register or nominate my company?
- Which departments need to approve us?
Finding the right entry point matters because the person who starts your application may not be the person who approves you. Supplier approval can also be separate from part approval. Knowing how to get past the gatekeeper in cold calling helps you reach that person faster.
A manufacturer may approve your company. But he will also ask for samples, testing, an audit or PPAP before approving a specific part for production.
The Six Steps to Get Added as an Approved Supplier
To get added as an approved supplier, you have to choose the right supplier, find the right contact, prepare your documents, register, pass the review and complete the audit. Manufacturing lead generation helps you find the right manufacturers.
Now let’s be clearer with the steps:
- First, confirm which approval path applies. Do you want to sell direct materials, indirect/MRO supplies or on-site services? This determines the documents and teams involved.
- Next, find the entry point. Look for a supplier registration page or portal. You can also ask purchasing for the right form. Large manufacturers often use portals and small manufacturers may handle this through purchasing.
- Preparing the right documents is very important. Your documents depend on what you sell. A production supplier may need quality and technical records. Whereas an on-site service provider may need insurance and safety records.
- Don’t forget to complete the registration. Fill in every field and choose the correct product or service category. Also, check your company name, address, tax details, contacts, certifications and bank information before submitting.
- Now, your job is to pass the review. Procurement, quality, engineering, finance, operations or safety may review your application. They may ask for more information.
- Lastly, complete the audit or trial order. You may need an audit, samples, testing, first-article inspection, part approval or a trial order before purchase order lines begin.
If you choose the wrong supplier type, it can lead to the wrong documents and that affects the rest of the steps. So be certain with each and every step. Knowing who buys in manufacturing helps avoid this mistake.
Is the Approved Vendor List a Hard Rule or a Preference?
Whether the approved vendor list is a rule or a preference depends on the manufacturer’s purchasing system. Some systems block buyers from ordering from unapproved suppliers. Other companies allow managers to approve exceptions.
An enterprise resource planning (ERP) system can control purchasing. If the approved supplier list is connected to the ERP, an unapproved supplier may not be available when the buyer creates a purchase order. That’s why ask the buyer, “Does your system block unapproved manufacturers or can you approve an exception?”
Oracle, for example, can link an approved supplier to a specific product, category, supplier site or receiving location.
Approved and preferred are different. If approved, you are allowed to receive orders. But if preferred, the manufacturer chooses you before other approved manufacturers.
We know approval status does not guarantee orders. A manufacturer may also need a second source if it depends too much on one supplier or needs more capacity.
If the buyer says the list is closed, ask, “Are you looking for a second source for this product?” That gives you a different way into the supplier process.
Approved Vendor List Requirements by Supplier Type
What you need in the approved vendor list depends on what you sell. If you see, parts suppliers need quality documents, MRO suppliers need business documents and on-site service suppliers need safety documents.
| Supplier type | What they check | Common documents | Main reviewers |
| Direct materials/components | Parts used in the finished product | Quality certificates, inspection records, traceability, first-article or PPAP documents | Quality, engineering |
| Indirect/MRO | Supplies and spare parts | W-9 or local tax form, insurance, bank details | Procurement, finance |
| On-site services | Workers at the plant | Insurance, safety records, training, prequalification documents | Safety/EHS, procurement |
Here, MRO means maintenance, repair and operations. EHS means environmental, health and safety. PPAP means Production Part Approval Process. And IATF 16949 is a quality standard used in the automotive industry.
For direct materials, the manufacturer may also ask for ISO 9001, IATF 16949, samples, audits, production capacity or lead times. Linde, for example, may use self-assessments, risk reviews and site audits.
Not every manufacturer requires ISO 9001 or PPAP. That’s why check the manufacturer’s own requirements first. Texas Instruments, for example, uses PPAP for certain automotive products.
For on-site work, the manufacturer chooses the safety platform. It may use Avetta, ISNetworld or Veriforce. If you pass one platform, it does not automatically clear you on another. Your approval status may cover only one product, category, site or plant.
If there is no supplier portal, check the website footer. Then search “supplier registration” or “become a supplier.” Smaller manufacturers may handle registration through purchasing.
How Long Does Supplier Approval Take?
Supplier approval can take days or weeks. It depends on what the manufacturer needs to check.
| Process | What it means | Time |
| Vendor setup | Adds your company to the system | 1-3 days by portal and 1-3 weeks by email |
| Supplier qualification | Checks if your company can supply | No standard time |
| Part approval | Checks if a specific part is approved | 2-4 weeks for higher-level PPAP |
Vendor setup is the basic company registration. As per Stampli’s benchmark guidance, it is usually the fastest step.
Supplier qualification is a deeper check. The manufacturer may check your quality, capacity and technical ability. There is no standard time for this step.
Part approval is for a specific product. Texas Instruments publishes that higher-level PPAP reviews can take 2-4 weeks. This is separate from approving your company.
Research from 6sense’s 2025 B2B Buyer Experience Report found that buyers often choose potential suppliers early in the buying process. In its 2025 study, buyers filled about 3.6 of 5.1 shortlist spots on the first day. They later bought from that shortlist 95% of the time.
This means your company should be known before the manufacturer sends out an RFQ. If you register only after the RFQ is sent, you may be too late for that opportunity.
Why Qualified Suppliers Still Get Rejected
A good supplier can still be rejected because the application has a problem. Some of its most common problems are:
- Incomplete profile: Fill in every required field. This may include your company, tax, contact, product, bank and certification details.
- Expired documents: Check that your certificates have not expired. Also, make sure they apply to the right company, plant, product or process.
- Wrong category: Choose the category that best matches what you sell. The wrong category may send your application to the wrong team.
- Failed checks: The manufacturer may check your legal information, sanctions status and supplier records. OFAC is the U.S. Treasury office that manages U.S. sanctions lists.
- Wrong bank details: Make sure your bank information matches your company records. Try to use the manufacturer’s approved portal or verification process and do not send bank changes from a personal email.
There can also be a scope problem. You may be approved to supply one product or plant but not another. An employee inside the company may also nominate you.
Supplier.io lists an internal sponsor as one possible way to get onto a custom supplier list. This does not guarantee approval status. So, before submitting, check that your information is complete and your bank and compliance details are accurate. Most importantly, clearly tell the manufacturer what you sell and what you can supply.
What to Do When You Submit and Hear Nothing
If you submit and hear nothing, do not just wait, but follow up and ask where your application stands. Silence does not mean you were rejected. First, ask if they received your application. Then ask if anything is missing.
To confirm receipt, you can say, “Did you receive my supplier registration?” While asking for the status, you can say, “What stage is my application in?” And while asking what is missing, you can say, “Do you need anything else from me?”
Do not send the same application again even if something is missing. If there is a supplier portal, check the status. It may show submitted, pending review, more information needed, approved or rejected. Microsoft uses these stages in its vendor process.
Still, if you get no reply, contact purchasing, sourcing, procurement or the supplier liaison. You can ask them, “What do you need from me to move this forward?”
There is no standard waiting time for supplier qualification. Ask for the current status whenever it’s necessary.
Conclusion
Getting approved by a manufacturer is not just about filling out a form. First, you have to find the right person to contact. Then send the documents the manufacturer asks for. Make sure your information and certificates are current.
If you do not hear back, follow up and ask about your application. Do not submit the same application again.
Your main task is to show the manufacturer what you sell, prove that you can supply it and give them the information they need to approve you.
Frequently Asked Questions
Who approves new suppliers at a manufacturing company?
More than one team may approve new suppliers at a manufacturing company. Procurement may handle the paperwork; quality checks quality, engineering checks technical ability and safety checks on-site service suppliers.
Do you need ISO 9001 to get on a manufacturer’s approved vendor list?
You do not always need ISO 9001 to get on a manufacturer’s approved supplier list. Some suppliers may need it or another industry standard. For instance, MRO and service suppliers may need insurance, tax, safety and compliance documents instead.
How long does supplier approval take at a manufacturer?
The duration for supplier approval at a manufacturer depends on the type of approval. Vendor setup can take 1-3 business days through a portal or 1-3 weeks by email. Whereas higher-level PPAP reviews can take 2-4 weeks.
What documents do manufacturers require from a new supplier?
Manufacturers require documents from a new supplier depending on what they sell. Parts suppliers may need quality and inspection records. MRO suppliers may need a W-9, insurance and bank details. And service suppliers may need safety and insurance records.
Can you sell to a manufacturer without being on their approved vendor list?
You can sometimes sell to a manufacturer without being on their approved supplier list. Some systems block orders from unapproved suppliers, while some companies allow exceptions. However, a second-source project can also be another way to qualify.
