Yes they can, from you. In fact, they will want you to cover the whole amount. Part of a new federal law that outlawed online gambling also allows credit card companies to hold the users fully liable for the charges.
SECURITY AND ACCOUNTABILITY FOR EVERY PORT ACT OF 2006
[[Page 120 STAT. 1884]]
Public Law 109-347
109th Congress
``(A) Credit; creditor; credit card; and card
issuer.--The terms `credit', `creditor', `credit card',
and `card issuer' have the meanings given the terms in
section 103 of the Truth in Lending Act (15 U.S.C.
1602).
``(a) Regulations requiring each designated payment system, and all participants therein, to identify and block or otherwise prevent or prohibit restricted
transactions through the establishment of policies and procedures
reasonably designed to identify and block or otherwise prevent or
prohibit the acceptance of restricted transactions in any of the
following ways:
``(b) Proceedings.--
``(1) Institution by federal government.--
``(A) In general.--The United States, acting through
the Attorney General, may institute proceedings under
this section to prevent or restrain a restricted
transaction.
``(B) Relief.--Upon application of the United States
under this paragraph, the district court may enter a
temporary restraining order, a preliminary injunction,
or an injunction against any person to prevent or
restrain a restricted transaction, in accordance with
rule 65 of the Federal Rules of Civil Procedure.
``(2) Institution by state attorney general.--
``(A) In general.--The attorney general (or other
appropriate State official) of a State in which a
restricted transaction allegedly has been or will be
initiated, received, or otherwise made may institute
proceedings under this
[[Page 120 STAT. 1960]]
section to prevent or restrain the violation or
threatened violation.
``(B) Relief.--Upon application of the attorney
general (or other appropriate State official) of an
affected State under this paragraph, the district court
may enter a temporary restraining order, a preliminary
injunction, or an injunction against any person to
prevent or restrain a restricted transaction, in
accordance with rule 65 of the Federal Rules of Civil
Procedure.
This has been a fascinating year of events in regards to the above referenced Safe Port Act; new developments are right around the corner. I wish you the best.