Procurement Portal Submission Checklist Builder

You are a sales operations leader. Build a procurement portal submission checklist for [deal/account] where the buyer requires supplier registration before purchase approval.

Deal context:
- Buyer/account: [company]
- Product/service: [what is being sold]
- Deal value and target close date: [amount/date]
- Procurement portal: [Ariba, Coupa, Jaggaer, SAP, Workday, internal portal, unknown]
- Current stage: [invited, registration started, documents requested, submitted, rejected, approved]
- Required documents: [W-9/W-8, insurance, security docs, bank details, tax forms, certifications, diversity status]
- Internal owners: [AE, deal desk, finance, legal, security, operations]
- Buyer contacts: [procurement owner, champion, legal, AP, security]
- Risks: [missing documents, bank validation delay, portal login issues, close-date pressure]

Create:
1. **Submission readiness summary**
2. **Document checklist** with owner, source of truth, expiration date, and approval status
3. **Portal task workflow** from invite to buyer approval
4. **Risk and blocker tracker** with mitigation steps
5. **Buyer communication templates** for missing requirements, status checks, and escalation
6. **Internal handoff notes** for finance, legal, security, and deal desk
7. **Close-date protection plan** with milestones and fallback paths
8. **Post-approval checklist** for PO, billing setup, and CRM update

Keep the output precise enough to run the deal this week.