You close a deal in your CRM . The client's approval notes live in Slack. The invoice lands in your accounting software. By month-end close, nobody can find the original deal conditions, the discount justification, or why that contract amendment happened. The data didn't disappear—it fractured. This isn't a storage problem. It's a handoff problem. When a deal passes from person to person, system to system, something always leaks. We've mapped nine predictable breakpoints where deal context orphans, and which integrations actually preserve it end-to-end. Handoff 1: Deal notes → Slack message thread (30% context lost) A sales rep captures deal terms in the CRM. Then someone asks a question in Slack. The answer—often the most important nuance—lives in Slack, not in the CRM record. Why it breaks: Slack is ephemeral. A thread from three weeks ago is archaeology. Even if you search for it, there's no permanent link back to the deal in your CRM. What survives: Message text (unless deleted). What drowns: attachment context, emoji reactions as decision markers, timestamps that map to deal stage changes. Real scenario: Client balks at price. Sales rep negotiates in Slack. Agrees to 15% discount for 12-month commit. No one writes it back to the deal record. Three months later, accounting queries the margin. No one can trace why the deal was priced differently. To lock this down: Use CRM-native team chat instead of Slack, or mandate that Slack decisions get summarized in a custom deal field before the deal moves to the next stage. Handoff 2: Approval status → Slack emoji (40% of decision trails lost) Legal approves a contract. Someone drops a ✅ emoji in Slack. Marketing approves: another emoji. By the time the deal reaches accounting, there's no audit trail—just a row of emojis and no timestamp for each approval. Why it breaks: Emoji reactions aren't machine-readable. If someone deletes the message, the approval vanishes. If Slack's workspace is archived or migrated, emojis don't export. What survives: The emoji itself (temporarily). What drowns: Approval timestamp, approver identity (if Slack is multi-workspace), conditional approvals ('approved if price stays under $50K'), sign-off dates for tax or compliance audits. To lock this down: Route approvals through e-signature workflows or a CRM approval field. Slack can trigger the workflow, but the approval record lives in your system of record, not in chat. Handoff 3: Deal amount → CRM close (sync lag = 2–8 hours) Deal closes. CRM records $47,500. Accounting software polls your CRM every 4 hours. For 4 hours, there's a gap. If the deal amount changes (client negotiates last-minute refund), the accounting system may sync the wrong number. Why it breaks: Most CRM-to-accounting integrations use scheduled polling, not real-time webhooks. The more deals you close, the wider the window for discrepancies. What survives: Deal amount (usually). What drowns: Reason for last-minute changes, currency conversions if deal was in USD but invoice needs MYR, deal stage nuances (won vs won-but-on-hold). Real scenario: Deal closes at $50K at 4:45 PM. Client calls back at 5:30 PM with a 10% refund request. Sales rep agrees, updates CRM to $45K at 5:35 PM. Accounting syncs at 6:00 PM and pulls $45K. But invoice was already drafted at $50K. Accounting manually corrects it. No one flags that the original deal was modified after close, so it doesn't count toward Q4 revenue targets. To lock this down: Use real-time webhooks or event streams instead of scheduled polling. Built-in AI automations can watch for deal changes and flag discrepancies before they reach accounting. Handoff 4: Deal conditions → Invoice line items (35% of discount logic lost) Deal includes a tiered discount: $30K for months 1–6, $22K/month for months 7–12. CRM stores the total. Accounting system sees a flat $26K/month average. Invoice gets cut at the average, not the tiered rate. Why it breaks: Most CRM-to-accounting integrations pass only the deal amount and close date, not the full discount schedule or tier logic. The logic stays in the deal record; the invoice engine doesn't know about it. What survives: Total deal value. What drowns: Payment schedule, condition-based pricing, volume discounts tied to future milestones, service-level tiers that affect margin. To lock this down: Store deal terms as structured data in your CRM (not free-form text), and build invoice templates that reference those fields. If your accounting software can't consume that granularity, use dedicated billing software that can. Handoff 5: Contract amendments → Invoice version control (50% of change history lost) Client requests a contract amendment: reduce scope from 50 hours to 35 hours, trim price from $7,500 to $5,250. New contract is signed and stored. But the old contract, the amendment request, and the justification for the price cut live in three different places: DocuSign, email, CRM notes. Why it breaks: E-signature platforms and CRMs do