PY01004: Invalid Card Number
What This Means
The card number entered is not valid. Card numbers follow specific patterns and include check digits for validation.
Common Causes
- Typo — One or more digits entered incorrectly
- Missing digits — Not all digits were entered
- Extra digits — Too many digits entered
- Wrong card — Different card number than physical card
- Card reader error — Chip/swipe read the wrong data
How to Fix
1. Re-enter the Card Number
Carefully enter all digits:
- Check the physical card
- Enter each digit slowly
- Verify the full number before submitting
2. Check Card Type
Ensure the card type is supported:
- Visa (starts with 4)
- Mastercard (starts with 51-55 or 22-27)
- Amex (starts with 34 or 37)
- Discover (starts with 6011, 622, 644-649, 65)
3. Try Again with Card Reader
If using a chip/swipe reader:
- Clean the card chip
- Try a different read method (chip vs swipe)
- Manually enter if reader fails
4. Use a Different Card
If the card number continues to fail:
- The card may be damaged
- Try a different card
- Use an alternative payment method
5. Check for Card Damage
Physical card issues:
- Scratched magnetic stripe
- Damaged chip
- Worn or faded numbers
- Card may need replacement
Card Number Formats
| Card Type | Length | Starts With |
|---|---|---|
| Visa | 16 | 4 |
| Mastercard | 16 | 51-55, 22-27 |
| Amex | 15 | 34, 37 |
| Discover | 16 | 6011, 622, 644-649, 65 |