Yes, crypto transactions can be rejected in extreme cases. crypto transactions that fall under these categories will be rejected:
To comply with crypto policies and regulations, transactions that do not meet the required regulatory standards will be flagged and rejected, with the funds returned to the source wallet.
Transactions that fail AML (Anti-Money Laundering) screening will be flagged, rejected, and reversed to the source wallet.
Any transactions below the minimum required amount will also be rejected and returned to the source wallet.