✉️ Perdura IP Litigation Series

Cease & Desist Evidence Package

A Checklist for Pre-Action Correspondence Evidence

A cease and desist letter is also evidence — and so is the response.

  • Preserve all evidence before sending — complete capture before any outreach
  • Compile IP rights documentation — registration certificates, chain of title
  • Prepare the infringement evidence annex — side-by-side, annotated captures
  • Document the recipient's identity — corporate registry, WHOIS, platform data
  • Preserve evidence of sending and receipt — delivery confirmation, email headers
  • Capture evidence of the response — removal, reply, or continued infringement
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Before
Preserve before sending
All infringing content must be captured and secured before the cease and desist letter is sent. The letter itself may prompt immediate removal of all evidence.
Receipt
Proof of delivery required
The date of receipt establishes when the infringer had knowledge of the IP rights — directly relevant to wilfulness and the calculation of enhanced damages in US proceedings.
14 days
Standard response period
Most cease and desist letters specify a 14-day response period. The infringer's response — or silence — within this period is itself evidence relevant to wilfulness and damages.
Key Principle
Sending a cease and desist letter frequently causes the infringer to remove all infringing content immediately. Every piece of preservation evidence must be collected and secured before the letter is sent — not after.
What's Inside

7 steps for pre-action evidence.

I Preserve All Evidence Before Sending — complete capture before any outreach
II Compile IP Rights Documentation — registration certificates, chain of title
III Prepare the Infringement Evidence Annex — side-by-side, annotated captures
IV Document the Recipient's Identity — corporate registry, WHOIS, platform data
V Preserve Evidence of Sending and Receipt — delivery confirmation, email headers
VI Capture Evidence of the Response — removal, reply, or continued infringement
VII Assess Whether to Proceed to Litigation — admissions, new facts, wilfulness