If she authorizes you, this is permissible.

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The rule for  the walimah is, generally, that it must be organized and paid for by the husband, however it is permissible for the couple to organize it together if this is what they agree upon. Any other spending should be as per the agreement of the parties involved.

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He must ask the people around him or check the compass. If there are masjids, he must go there and check the direction where it was built on.

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