setUserProperties and event parameter keys in trackEvent must match ^[A-Za-z][A-Za-z0-9_]*$.
- Start with an uppercase or lowercase English letter (
A–Zora–z). - After the first character, use only English letters, digits (
0–9), or underscores (_). - Spaces, Korean characters and other non-English letters, and special characters such as
.,$, and^are prohibited.
delivery_address and productId2. Use built-in user property keys such as $email and $phone_number as defined by Notifly.
Notifly still stores data sent with keys that fall outside this format, but some features may be unavailable. A user property containing a period is unavailable in campaign condition search, user lists and details, and CSV exports of all users. It is also hidden in Property management, which prevents you from configuring encryption for it. User property and event parameter keys