Dear :

Thank you for your interest in [comany] and your desire for a credit account. Your confidence in our store is appreciated.

For the time being, however, we are not able to grant you credit, because you have been in this area only weeks/months, which is too short to meet our requests. We will be happy to review your application when you have lived here for at least months.

If you have any further questions, feel free to call me.

Sincerely yours,

[name]

[title]