Direct answer
You usually cannot assume that a “forex card” can be added to PayPal. Whether it works depends on how the card is issued and whether PayPal treats it as a compatible payment card for its card-linking flow.
How it works in practice
A forex card is typically a prepaid or bank-issued card connected to foreign currency balances (and sometimes to exchange features). PayPal, however, does not “understand” the forex purpose; it mainly checks whether the card can be used in its payment system.
When you try to add a card, PayPal (and the card’s issuing network/issuer) may run checks such as:
- Card type support (for example, whether it is processed like a regular debit/credit/prepaid card for online use)
- Region or currency compatibility in the card-linking process
- Whether the issuer permits the card for PayPal-type online transactions
- Limits that apply to new card registration attempts
If any check fails, the add-card attempt can be rejected even if the forex card works for other merchants.
Example checks you can do
You can verify compatibility without guessing by checking:
- Whether the forex card can be used for online card payments in general (not only at specific merchants)
- Whether the card is allowed for international/online transactions (as described by the card issuer)
- Whether PayPal shows an “add card” error that indicates unsupported card type or processing failure
If PayPal accepts the card, it will generally confirm successful addition during the linking step. If it does not, you would need a card that passes PayPal’s compatibility checks.
Relevant limitations and uncertainty
Because card acceptance is driven by issuer and PayPal compatibility rules that can vary, there is no permanent guarantee that every forex card can be added. Also, this answer does not cover your specific card or account settings, so the only reliable test is the actual add-card attempt and the resulting error/confirmation message.