informing about lost and found

[jkl]

Can you help to write it in a better way?

Dear x,

Your walltet has been turned in at the front desk of computer centre. You can pick it up any time before our centre closes at 8:00 pm tonight. Ater hours it will go to the security.


Thank you,

X

[Soup]

Hi jkl

Dear x,

Your wallet has been turned in at the front desk at the computer centre. You can pick it up this evening at any time before the centre closes at 8:00 pm. Upon closing hours, we will give it to security for safe keeping.


Thank you,

X

[puzzle]

SoupRe: informing about lost and found
Hi jkl

Dear x,

Your wallet has been turned in at the front desk at the computer centre. You can pick it up this evening at any time before the centre closes at 8:00 pm. Upon closing hours, we will give it to security for safe keeping.

I.Does "upon" mean "after" here?
II. Is there no need for "the" before "security" here?
Please.

[bhaisahab]

SoupRe: informing about lost and found
Hi jkl

Dear x,

Your wallet has been turned in at the front desk at the computer centre. You can pick it up this evening at any time before the centre closes at 8:00 pm. Upon closing hours, we will give it to security for safe keeping.

I.Does "upon" mean "after" here?
II. Is there no need for "the" before "security" here?
Please.

"Upon" in this sentence mean "at" "at the moment of closing".
There is no need for "the" before "security", in a company there can be several departments or services such as;

(The) security (department)
(The) personnel (department)
(The) finance (department) etc.

Usually one would refer to them as "security", "personnel", "finance" etc.

[puzzle]

Many thanks!