email
Same email, different records
Case differences and trailing spaces can make duplicate customers look separate during manual review.
Stripe duplicate customer audit
Find duplicate Stripe customers before invoices get split across records.
Duplicate customers are easy to miss when one record looks active and another holds the open invoice. LeakCheck groups repeated customer records and ranks the duplicates that deserve a billing review.
Read-only Stripe Connect or Stripe JSON export. No customer merges, no billing edits, and no paid decision before the free teaser.
Synthetic example$79
Open invoice split across recordsSample data
- 1Two customer records
Sample records share jane@example.com
- 2Open invoice found
One open invoice totals $79.00
- 3Human review needed
Merge only after checking billing context
Manual check
What to inspect before you merge anything.
A duplicate customer record is not automatically a leak. The risk starts when invoices, subscriptions, or billing context are split across records and nobody knows which customer is the billable one.
01
Normalize emails
Compare customer emails after trimming spaces and matching case-insensitive duplicates.
02
Group customer IDs
List every Stripe customer record tied to the same normalized email.
03
Check open invoices
Find open, uncollectible, or past-due invoices with amount remaining across the group.
04
Review subscriptions
Check whether active subscriptions and billing history are split between records.
05
Estimate exposure
Use open invoice amount first, then recurring exposure when open invoices are not present.
06
Owner decision
Decide whether to merge records, collect an invoice, leave the records separate, or ask support to review.
Duplicate patterns
Split records can hide different billing problems.
LeakCheck does not merge anything for you. It gives you the Stripe evidence so the next action is deliberate.
invoice
Open invoice on one record
A duplicate can hold an invoice that is easy to miss when the active subscription sits somewhere else.
subscription
Recurring exposure split
If open invoices are missing, the audit can still estimate duplicate recurring exposure from subscriptions.
coupon
Discount context missing
Customer-level discounts and duplicate records can make it harder to see why a price is lower than expected.
support
Support confusion
Duplicate records make it harder to answer which customer paid, which customer owes, and which record should stay.
other leaks
Other leak signals
The same audit also checks failed charges, dead trials, no-expiry coupons, past-due subscriptions, and mismatched invoices.
How LeakCheck helps
A duplicate customer audit without write access.
LeakCheck reads Stripe billing data, groups duplicate customers by normalized email, checks open invoices and subscription exposure, and ranks the finding beside the other leak types.
- OKStripe read_only OAuth or a Stripe JSON export upload.
- OKChecks customers, invoices, subscriptions, charges, prices, and products.
- OKReports the teaser total and leak count before any paid unlock.
- NONo customer merges, no invoice edits, no charges, no payment method moves.
Free activation path
See the report shape before you share Stripe data.
Open the sample report first. Then run your own free check by uploading a Stripe export or connecting read-only. The free teaser shows the headline total and leak count before any paid unlock.
Step 1Sample
Inspect synthetic findings and the report format.
Step 2Free check
Upload a Stripe export or connect read-only.
Step 3Decide
Pricing lives on the main page: $49 full report, optional $19/mo monitoring.
FAQ
Common duplicate customer audit questions
Q
Is every duplicate customer a billing leak?
No. Some duplicates are harmless. LeakCheck flags duplicate records that have open invoices or recurring exposure worth reviewing.
Q
Can LeakCheck merge the customers?
No. The audit is read-only through Stripe Connect or an export upload. It reports findings, then you decide what to do in Stripe.
Q
How does the audit match duplicates?
It normalizes customer emails, groups repeated records, and checks the grouped records for open invoices or recurring exposure.
Q
What data is needed?
For this check, Stripe objects such as customers, invoices, subscriptions, charges, prices, and products are useful.
Q
What else gets checked?
LeakCheck also checks failed charges, stale trials, no-expiry coupons, past-due subscriptions, and mismatched invoices.
Find duplicate customer records worth a billing review.
Start with the sample report, then run a free read-only audit with a Stripe export or Connect.
Start with the sample report Run your free check