Electronic purchasing method and apparatus for performing the same

1. A method, comprising:

identifying a transaction between a buyer and a merchant to purchase goods or services;

submitting a request to an account management system after receipt of the goods or services purchased by said buyer;

receiving, in response to said submitting, a limited use account identifier allocated by said account management system for use in said transaction, said limited use account identifier identifying a financial account at an issuer and selected from a pool of limited use account identifiers associated with said buyer; and

providing said limited use account identifier to said merchant to complete said transaction.

2. The method of claim 1 , wherein said limited use account identifier is associated with a record defining use limitations, said use limitations limiting the circumstances in which said transaction will be authorized.

3. The method of claim 1 , further comprising:

establishing a pre-authorization for the purchase, said pre-authorization including an amount and a period of validity.

4. The method of claim 3 , further comprising:

receiving, from the merchant, the limited use account identifier and an amount of the purchase; and

authorizing completion of the transaction using the limited use account identifier if said purchase amount is within the pre-authorized amount.

5. A method, comprising:

establishing a relationship between a client and a account issuing entity;

assigning a pool of payment account identifiers to said client prior to a purchase by the client using one of said payment account identifiers, said pool of payment account identifiers including a plurality of payment account identifiers each identifying a separate financial account, each formatted for processing by payment card networks, and each issued to be used without presentment of an associated physical transaction card;

receiving, from the client, a request to conduct a purchase transaction with a merchant;

selecting an available one of said plurality of payment account identifiers from said pool of payment account identifiers assigned to said client; and

providing said available one of said plurality of payment account identifiers to said client for use in conducting said purchase transaction.

6. The method of claim 5 , wherein said request comprises:

an identification of a financial amount for the purchase, and a purchase order identifier assigned by the client for the purchase.

7. The method of claim 6 , wherein said purchase order identifier may be used to identify information in at least one of: a general ledger of the client; a client database; and a account management system database.

8. The method of claim 6 , said request further comprising an identification of the merchant.

9. The method of claim 8 , said identification of the merchant comprising a standard industrial code (SIC) corresponding to the merchant.

10. A method, comprising:

receiving, after completion of a transaction between a client and a merchant involving a payment account identifier, a settlement record associated with said transaction, said payment account identifier selected from a pool of financial account identifiers associated with said client, each identifying a separate financial account and an issuer, each formatted for processing by payment card networks, and each issued to be used without presentment of an associated physical transaction card;

determining whether said payment account identifier is to be made available for use in a subsequent transaction; and

updating information associated with said financial account identifier to indicate that said identifier is available for use in a subsequent transaction.