Quick answer: For signing, classical electional practice looks at three things: Mercury, which signifies the document; the Moon, which decides the moment; and whether the Moon is void of course, which the tradition reads as a sign that nothing will come of what is begun.
Most people meet this subject through Mercury retrograde, which is the caution about what to avoid. Electional astrology is the other half: the method for choosing a moment rather than merely surviving one, and it has more to say about paperwork than the retrograde rule does.
Mercury Signifies the Document
In the classical scheme Mercury governs writing, records, agreements and the language they are made of. That is why it carries the signature: not because Mercury is lucky, but because a contract is a document, and documents are Mercury's business.
What an electional astrologer checks is Mercury's condition, in this order. Whether it is direct or retrograde. Whether it is free of the Sun's beams, since a Mercury combust is a document nobody is reading properly. Whether it is applying to a malefic, which is worth more attention than the retrograde most people fixate on.
The retrograde caution is real and it is narrower than its reputation. Traditional practice does not say a contract signed then is void; it says a matter begun then is likely to be revisited, which for a contract usually means renegotiated. Whether that is a problem depends entirely on what you are signing.
The Moon Decides the Moment
Mercury moves slowly enough to define a season. The Moon moves fast enough to define an hour, which is why it carries most of the weight in any election.
Three conditions, in descending order of how much classical authors cared.
Void of course. The Moon is void of course when it will make no further major aspect before leaving its sign. Lilly is blunt about it: nothing begun then comes to much. For a contract this is the single most quoted rule in the literature, and it is also the easiest to check, because a void period has an exact start and an exact end.
Applying to a malefic. A Moon closing on Mars or Saturn is read as the matter meeting obstruction or delay. The tradition treats an applying aspect as the live one and a separating aspect as background, which is why the direction matters as much as the aspect.
The Moon's sign and speed. A fast Moon carries a matter along; a slow one lets it sit. Signs matter less here than most modern writing suggests, and the older texts spend far more ink on the aspects than on the sign.
The Ascendant and Its Ruler
The rising sign at the moment of signing describes the matter itself, and its ruler describes how the matter proceeds. An electional astrologer fits the Ascendant to the nature of the undertaking: a solid earth sign for a lease, a fixed sign for something meant to last, and a strong, direct, well-aspected ruler in every case.
This is the part of the method most often skipped, and it is the part that distinguishes an election from a superstition. Avoiding a bad moment is easy; choosing a good one requires deciding what the agreement actually is.
What the Method Does Not Claim
Three limits, stated because the tradition states them.
An election cannot rewrite the underlying situation. Classical authors are explicit that a well-chosen moment shapes the beginning of an undertaking and does not overrule the nativity of the person or the merits of the deal. A bad contract signed at a good hour is still a bad contract.
An election is not a forecast. It describes a favourable condition of the sky, in the same way a weather window describes a favourable condition for sailing. What happens afterwards is decided by the voyage.
And the practical constraint usually wins. Most contracts have a deadline, and the honest use of the method is to choose the best available hour inside the window you actually have, which is what the best dates tool is for.
A Practical Order of Operations
If you have a free choice of day and hour, the classical order runs: rule out void-of-course windows first, since they are exact and cheap to check; then check Mercury is direct and out of the beams; then look for a Moon not applying to Mars or Saturn; then fit the Ascendant to the matter; then, if you want the finest layer, choose a planetary hour of Mercury or Jupiter.
If you do not have a free choice, do the first step and stop. It is the one the tradition weights most heavily and the only one that can be checked in a few seconds.
Frequently Asked Questions
Is it bad to sign a contract during Mercury retrograde?
Tradition treats it as a caution rather than a prohibition. A matter begun under a retrograde Mercury is read as likely to be revisited, which for a contract usually means renegotiated rather than void. Whether that is a problem depends on what is being signed.
What is the void-of-course Moon rule for signing?
The Moon is void of course when it will form no further major aspect before it changes sign. Classical electional practice avoids beginning anything in that window, and Lilly reads it as a sign that nothing will come of the matter. It is the most quoted rule in the literature for paperwork.
Can astrology tell me if a contract is good?
No, and the tradition does not claim it can. Electional astrology chooses a moment to begin; it does not evaluate the terms. A poor agreement signed at a favourable hour remains a poor agreement.
