Quick Answer
High decline velocity means failed attempts are arriving too quickly or too densely for the account's normal pattern. Stripe often reads this as fraud pressure or degraded traffic quality.
What Stripe Is Likely Comparing
- decline rate and attempt volume by time window
- device and IP concentration
- source quality before and after the spike
Most Common Root Causes
- card testing and bot activity
- weak rate limiting
- low-intent paid or affiliate traffic
Evidence Stripe Will Weight Most
- decline timelines
- attempts per IP or device
- performance by traffic source
Operational Fix Sequence
- Identify the concentrated source of failed attempts.
- Add or tighten rate limits and authentication.
- Reduce low-quality acquisition until approval quality stabilizes.